chemicalelements.com

https://chemicalelements.com· First analyzed 08 May 2026· Updated 08 May 2026

Export

Mobile

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Hosting Provider

pair Networks

IP Address

216.92.158.31

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Pittsburgh, United States

ASN

AS7859

Organization

pair Networks

Server

Apache

Nameservers

ns000.ns0.com.ns522.pair.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

258 ms10%

Speed Index

335 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

77 KB

10 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

pair Networks

Technology Stack

3 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Web Servers

Apache

SEO Analysis

D41/100

Meta Tags10/15

Content6/12

Headings0/8

Technical6/25

E-E-A-T0/7

Images4/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

chemicalelements.comchemicalelements.com

Chemical Elements.com - An Interactive Periodic Table of the Elements

An up-to-date periodic table with detailed but easy to understand information

Title Length69 chars

Recommended: 50-60 chars (~417px / 580px)

Description Length77 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

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Crawlability

Sitemap

robots.txt

2 rules

Local SEO

Local Search Readiness

0/100

Poor

15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F25/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

4/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:4%

Words:83

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary22w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

63/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

65/100

A+

8 mg

CO₂e / view

76.7 KB

Page Weight

95%

Cleaner Than

New Visitor

9 mg

Returning (cached)

4 mg

Annual (10K/mo)

924 g

Emission Segments

Data Center

<0.001 g

Network

2 mg

Device

5 mg

Resource Breakdown

Images

62.3 KB

HTML

14.4 KB

Green Hosting Verified

pair Networks

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

41d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

21.03.2026

Valid Until

19.06.2026

Subject Alternative Names (2)

chemicalelements.comwww.chemicalelements.com

SHA-256 Fingerprint

DF:F6:2F:34:4C:DD:96:FA:31:98:58:3A:FD:16:96:BC:05:3C:9C:77...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

Keep-Alive

content-length

14400

content-type

text/html

date

Fri, 08 May 2026 20:50:31 GMT

etag

"3840-5ff9e06969200"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mailwash52.pair.com

Domain Information

chemicalelements.com

Domain Age

27y 6m

Created

22.10.1998

Expires

21.10.2027

Last Updated

04.03.2022

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

29/100

Not Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman + Arial

WCAG AA

75/100

Readability

/30

23/30

16px · LH --

Hierarchy

/20

10/20

WCAG

/25

22/25

6.15:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Times New Roman

Body Font

Arial

Sans16px

Contrast Ratio

6.15:1

WCAG AA (≥4.5:1)

Reading Comfort

~64 CPL

Optimal (45–75)

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line length: ~64 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 30/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.2:1).

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 30

Color Palette

10 unique colors

3.68:1 AA Large Light

#ffffff

Background· 73.3%

#808594

Secondary· 2.8%

#add9e6

Primary· 10.3%

#c3b863

Secondary· 5.7%

#8babaa

Secondary· 3.3%

#804975

Secondary· 2.8%

#d9e48c

Accent· 1%

#f1ffda

Accent· 0.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(1)tags.expo9.exponential.com(1)

Website Identity

chemicalelements.com

27 years old

Location detected: 🇺🇸 United Statesvia ip

NameCheap, Inc.

Sponsored

Last analyzed: 08 May 2026 at 20:50

Historical Analysis & Change Tracking