Periodic-table.rsc.org - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
95% 
Page quality
55% 
Page structure
79% 
Link structure
92% 
Server
54% 
External factors
0% 
SEO Score
Response time
0.17 s
File size
2,015.70 kB
Words
437
Media files
15
Number of links
136 internal / 25 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Periodic Table – Royal Society of Chemistry
The length of the page title is perfect. (392 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Interactive periodic table with element scarcity (SRI), discovery dates, melting and boiling points, group, block and period information.
The length of the meta description is perfect. (820 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://periodic-table.rsc.org/
The specified canonical link points to a different page.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
descriptionInteractive periodic table with element scarcity (SRI), discovery dates, melting and boiling points, group, block and period information.
msapplication-TileColor#2d89ef
theme-color#ffffff
langen
Content-Typetext/html; charset=UTF-8

Test up to 1.000 webpages of periodic-table.rsc.org with our free plan!

Try For Free
No trial. It's just free!

Page quality

Content
(Critically important)
There are only 437 words on this page. Good pages should have about 800 words of useful content.
12.4% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
3 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 10.89 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No viewpoint tag is provided.
This page loads 15 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is very large (2015.7 kB).
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 9 tags for this page.
Image SEO
(Somewhat important)
5 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
The HTTPS protocol for secure data transmission is not used.

Media list

URLAlt attributeTitle
...ewimages/arrow-right-o-light.png?6.0.4.2No alt attribute provided
...ages/newimages/menu-light-24.png?6.0.4.2No alt attribute provided
...assets.rsc.org/logo/rsc-logo-rev-230.pngRoyal Society of Chemistry logo
...Images/newimages/cross-light.png?6.0.4.2No alt attribute provided
...es/periodic-table-web-banner.jpg?6.0.4.2Download our element infographics - Find out more
/Content/Images/loading.gif?6.0.4.2loading
...ter/images/icons/chevron-right-light.pngNo alt attribute provided
...ts.rsc.org/logo/rsc-logo-rev-180x120.pngNo alt attribute provided
.../header-footer/images/icons/facebook.pngfacebook
...g/header-footer/images/icons/twitter.pngtwitter
.../header-footer/images/icons/linkedin.pnglinkedin
...g/header-footer/images/icons/youtube.pngyoutube

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 Classification
H2 Groups
H2 Blocks
H2 Periods
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 25 external links on this page.

Found links on this page

LinkAttributesAnchor text
http://periodic-table.rsc.org/Periodic Table
A-TITLE Periodic Table
http://periodic-table.rsc.org/Home
/historyHistory
/alchemyAlchemy
/podcastPodcast
/videoVideo
/trendsTrends
https://www.rsc.org/External Subdomain IMG-ALT Royal Society of Chemistry logo
http://periodic-table.rsc.org/Text duplicate Periodic Table
A-TITLE Periodic Table
http://periodic-table.rsc.org/Text duplicate Home
/historyText duplicate History
/alchemyText duplicate Alchemy
/podcastText duplicate Podcast
/videoText duplicate Video
/trendsText duplicate Trends
http://www.rsc.org/External Subdomain A-TITLE Royal Society of Chemistry - Advancing excellence in the chemical sciences
https://www.rsc.org/iypt/iypt-...External Subdomain IMG-ALT Download our element infographics - Find out more
/element/1/hydrogenH
A-TITLE Hydrogen
/element/2/heliumHe
A-TITLE Helium
/element/3/lithiumLi
A-TITLE Lithium
/element/4/berylliumBe
A-TITLE Beryllium
/element/5/boronB
A-TITLE Boron
/element/6/carbonC
A-TITLE Carbon
/element/7/nitrogenN
A-TITLE Nitrogen
/element/8/oxygenO
A-TITLE Oxygen
/element/9/fluorineF
A-TITLE Fluorine
/element/10/neonNe
A-TITLE Neon
/element/11/sodiumNa
A-TITLE Sodium
/element/12/magnesiumMg
A-TITLE Magnesium
/element/13/aluminiumAl
A-TITLE Aluminium
/element/14/siliconSi
A-TITLE Silicon
/element/15/phosphorusP
A-TITLE Phosphorus
/element/16/sulfurS
A-TITLE Sulfur
/element/17/chlorineCl
A-TITLE Chlorine
/element/18/argonAr
A-TITLE Argon
/element/19/potassiumK
A-TITLE Potassium
/element/20/calciumCa
A-TITLE Calcium
/element/21/scandiumSc
A-TITLE Scandium
/element/22/titaniumTi
A-TITLE Titanium
/element/23/vanadiumV
A-TITLE Vanadium
/element/24/chromiumCr
A-TITLE Chromium
/element/25/manganeseMn
A-TITLE Manganese
/element/26/ironFe
A-TITLE Iron
/element/27/cobaltCo
A-TITLE Cobalt
/element/28/nickelNi
A-TITLE Nickel
/element/29/copperCu
A-TITLE Copper
/element/30/zincZn
A-TITLE Zinc
/element/31/galliumGa
A-TITLE Gallium
/element/32/germaniumGe
A-TITLE Germanium
/element/33/arsenicAs
A-TITLE Arsenic
/element/34/seleniumSe
A-TITLE Selenium
/element/35/bromineBr
A-TITLE Bromine
/element/36/kryptonKr
A-TITLE Krypton
/element/37/rubidiumRb
A-TITLE Rubidium
/element/38/strontiumSr
A-TITLE Strontium
/element/39/yttriumY
A-TITLE Yttrium
/element/40/zirconiumZr
A-TITLE Zirconium
/element/41/niobiumNb
A-TITLE Niobium
/element/42/molybdenumMo
A-TITLE Molybdenum
/element/43/technetiumTc
A-TITLE Technetium
/element/44/rutheniumRu
A-TITLE Ruthenium
/element/45/rhodiumRh
A-TITLE Rhodium
/element/46/palladiumPd
A-TITLE Palladium
/element/47/silverAg
A-TITLE Silver
/element/48/cadmiumCd
A-TITLE Cadmium
/element/49/indiumIn
A-TITLE Indium
/element/50/tinSn
A-TITLE Tin
/element/51/antimonySb
A-TITLE Antimony
/element/52/telluriumTe
A-TITLE Tellurium
/element/53/iodineI
A-TITLE Iodine
/element/54/xenonXe
A-TITLE Xenon
/element/55/caesiumCs
A-TITLE Caesium
/element/56/bariumBa
A-TITLE Barium
/element/57/lanthanumLa
A-TITLE Lanthanum
/element/72/hafniumHf
A-TITLE Hafnium
/element/73/tantalumTa
A-TITLE Tantalum
/element/74/tungstenW
A-TITLE Tungsten
/element/75/rheniumRe
A-TITLE Rhenium
/element/76/osmiumOs
A-TITLE Osmium
/element/77/iridiumIr
A-TITLE Iridium
/element/78/platinumPt
A-TITLE Platinum
/element/79/goldAu
A-TITLE Gold
/element/80/mercuryHg
A-TITLE Mercury
/element/81/thalliumTl
A-TITLE Thallium
/element/82/leadPb
A-TITLE Lead
/element/83/bismuthBi
A-TITLE Bismuth
/element/84/poloniumPo
A-TITLE Polonium
/element/85/astatineAt
A-TITLE Astatine
/element/86/radonRn
A-TITLE Radon
/element/87/franciumFr
A-TITLE Francium
/element/88/radiumRa
A-TITLE Radium
/element/89/actiniumAc
A-TITLE Actinium
/element/104/rutherfordiumRf
A-TITLE Rutherfordium
/element/105/dubniumDb
A-TITLE Dubnium
/element/106/seaborgiumSg
A-TITLE Seaborgium
/element/107/bohriumBh
A-TITLE Bohrium
/element/108/hassiumHs
A-TITLE Hassium
/element/109/meitneriumMt
A-TITLE Meitnerium
/element/110/darmstadtiumDs
A-TITLE Darmstadtium
/element/111/roentgeniumRg
A-TITLE Roentgenium
/element/112/coperniciumCn
A-TITLE Copernicium
/element/113/nihoniumNh
A-TITLE Nihonium
/element/114/fleroviumFl
A-TITLE Flerovium
/element/115/moscoviumMc
A-TITLE Moscovium
/element/116/livermoriumLv
A-TITLE Livermorium
/element/117/tennessinerTs
A-TITLE Tennessiner
/element/118/oganessonOg
A-TITLE Oganesson
/element/58/ceriumCe
A-TITLE Cerium
/element/59/praseodymiumPr
A-TITLE Praseodymium
/element/60/neodymiumNd
A-TITLE Neodymium
/element/61/promethiumPm
A-TITLE Promethium
/element/62/samariumSm
A-TITLE Samarium
/element/63/europiumEu
A-TITLE Europium
/element/64/gadoliniumGd
A-TITLE Gadolinium
/element/65/terbiumTb
A-TITLE Terbium
/element/66/dysprosiumDy
A-TITLE Dysprosium
/element/67/holmiumHo
A-TITLE Holmium
/element/68/erbiumEr
A-TITLE Erbium
/element/69/thuliumTm
A-TITLE Thulium
/element/70/ytterbiumYb
A-TITLE Ytterbium
/element/71/lutetiumLu
A-TITLE Lutetium
/element/90/thoriumTh
A-TITLE Thorium
/element/91/protactiniumPa
A-TITLE Protactinium
/element/92/uraniumU
A-TITLE Uranium
/element/93/neptuniumNp
A-TITLE Neptunium
/element/94/plutoniumPu
A-TITLE Plutonium
/element/95/americiumAm
A-TITLE Americium
/element/96/curiumCm
A-TITLE Curium
/element/97/berkeliumBk
A-TITLE Berkelium
/element/98/californiumCf
A-TITLE Californium
/element/99/einsteiniumEs
A-TITLE Einsteinium
/element/100/fermiumFm
A-TITLE Fermium
/element/101/mendeleviumMd
A-TITLE Mendelevium
/element/102/nobeliumNo
A-TITLE Nobelium
/element/103/lawrenciumLr
A-TITLE Lawrencium
https://www.rsc.org/External Subdomain rsc.org
https://periodic-table.rsc.org/Subdomain Text duplicate Periodic Table
https://www.rsc.org/External Subdomain Text duplicate Home
https://www.rsc.org/about-us/External Subdomain About us
https://www.rsc.org/membership...External Subdomain Membership & professional community
https://www.rsc.org/campaignin...External Subdomain Campaigning & outreach
https://www.rsc.org/journals-b...External Subdomain Journals, books & databases
https://www.rsc.org/teaching-a...External Subdomain Teaching & learning
https://www.rsc.org/news-events/External Subdomain News & events
https://www.rsc.org/locations-...External Subdomain Locations & contacts
https://www.rsc.org/careers/External Subdomain Careers
https://www.rsc.org/awards-fun...External Subdomain Awards & funding
https://www.rsc.org/advertise/External Subdomain Advertise
https://www.rsc.org/help-legal/External Subdomain Help & legal
https://www.rsc.org/membership...External Subdomain Become a member
https://www.rsc.org/membership...External Subdomain Connect with others
https://www.rsc.org/membership...External Subdomain Supporting individuals
https://www.rsc.org/membership...External Subdomain Supporting organisations
https://www.rsc.org/membership...External Subdomain Manage my membership
https://www.facebook.com/Royal...External Subdomain Facebook
IMG-ALT facebook
https://twitter.com/RoySocChemExternal Twitter
IMG-ALT twitter
https://www.linkedin.com/compa...External Subdomain LinkedIn
IMG-ALT linkedin
https://www.youtube.com/user/w...External Subdomain Youtube
IMG-ALT youtube
/cookies/Subdomain Cookies
/cookies/Subdomain Do not sell my personal data
/cookies/Subdomain Text duplicate Cookies

Server configuration

HTTP redirects
(Critically important)
The checked page does not redirect to another URL.
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
This page loads 7 CSS files. This may affect the page load time negatively.
This page loads 15 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is very large (2,016 kB).
The page response time is excellent with 0.17 seconds.

HTTP Response Header

NameValue
cache-controlprivate
transfer-encodingchunked
content-typetext/html; charset=utf-8
content-encodinggzip
varyAccept-Encoding
x-frame-optionsSAMEORIGIN
dateTue, 04 Mar 2025 03:38:09 GMT
statuscode200
http_versionHTTP/1.1

External factors

We didn't find any backlinks to this page.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

periodic-table.rsc.org
Periodic Table – Royal Society of Chemistry
Interactive periodic table with element scarcity (SRI), discovery dates, melting and boiling points, group, block and period information.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Periodic71%Check
Table71%Check
periodic table71%Check
interactive periodic table62%Check
Periodic Table Royal Society59%Check
Royal48%Check
Society48%Check
Royal Society48%Check
element48%Check
rsc48%Check
Show more keywords and terms

Test up to 1.000 webpages of periodic-table.rsc.org with our free plan!

Try For Free
No trial. It's just free!

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions