Atomic structure

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Question 13

Medium

Henry Moseley's work in 1913 on X-ray spectra led to a fundamental revision of how elements are arranged in the periodic table.

Describe one major difference in how elements are ordered in the modern periodic table compared to Mendeleev's periodic table.

[2]

The electronic configuration of argon is $2, 8, 8$ . State and explain the chemical reactivity of argon.

[2]

Neon has two main stable isotopes: $1020Ne^{20}_{10}\text{Ne}$ and $1022Ne^{22}_{10}\text{Ne}$ . Complete the table below to show the number of protons, neutrons, and electrons in an atom of each isotope:

Subatomic particle	$1020Ne^{20}_{10}\text{Ne}$	$1022Ne^{22}_{10}\text{Ne}$
Protons
Neutrons
Electrons

[3]

Atomic structure

Question 13

Atomic structure Questions

Atomic structure

Question 13

Atomic structure Questions