Which statement identifies the element arsenic?
(1) Arsenic has an atomic number of 33.
(2) Arsenic has a melting point of 84 K.
(3) An atom of arsenic in the ground state has eight valence electrons.
(4) An atom of arsenic in the ground state has a radius of 146 pm.

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04-06-2015
Chemistry

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Which statement identifies the element arsenic?
(1) Arsenic has an atomic number of 33.
(2) Arsenic has a melting point of 84 K.
(3) An atom of arsenic in the ground state has eight valence electrons.
(4) An atom of arsenic in the ground state has a radius of 146 pm.

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stephenlee0912 stephenlee0912 · Answer 1 · 2015-06-04T20:26:44-04:00

stephenlee0912 stephenlee0912

04-06-2015

The anwer is (1). The atomic number of arsenic is 33.

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PBCHEM PBCHEM · Answer 2 · 2018-07-21T14:27:42-04:00

PBCHEM PBCHEM

21-07-2018

Answer : Option A) Atomic number of Arsenic is 33.

Explanation : Arsenic contains same number of protons in its atomic nucleus. In arsenic there are 33 protons found in the atomic nucleus. Hence, the atomic number will be 33. It has 5 valence electrons in its outermost shell, which is also called as valence shell. So, its valency becomes 5.

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