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Questions tagged 'Atoms'

31 questions

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Anonymous

Feb 20, 2025

How many moles of Pb are in 4.71 x 10^21 Pb atoms?

How many moles of lead (Pb) are present in 4.71 x 10^21 atoms of Pb? I have calculated possible answers, which include 0.00782, 2.84 x 10^45, 207.2, and 6.022 x 10^23. Could you help me determine the...

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Anonymous

Feb 12, 2025

If an atom has 1 to 3 valence electrons, what will it do?

If an atom has 1 to 3 valence electrons, what actions might it take in terms of electron behavior? A. Accept electrons B. Donate electrons C. Move electrons to a lower energy shell D. Move electrons...

How many Li atoms are contained in 97.9g of Li?

I would like to verify my answer for a homework question: How many lithium (Li) atoms are contained in 97.9 grams of lithium? Thank you!

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Anonymous

Feb 10, 2025

Compared to atoms of metals, atoms of nonmetals generally

Compared to metal atoms, how do nonmetal atoms generally differ in terms of their properties and behavior?

How many lone pairs of electrons exist on the central atom in ammonia (NH3)?

How many lone pairs of electrons are present on the central atom in ammonia (NH3)? Two Four Three None One

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Anonymous

Feb 02, 2025

Which of these substances contains the most total atoms per molecule?

Which of the following substances contains the highest total number of atoms per molecule? a) Na2PFO3 b) H2SO4 c) Ni(NO3)2 d) NbCl5

Help with chemistry question?

Can you help me with the following chemistry questions? The radius of a gold (Au) atom is approximately 1.35 angstroms. a) Please express this distance in both nanometers and picometers. b) How many...

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Anonymous

Jan 13, 2025

an atom of fluorine has 9 electrons. its second energy level has?

An atom of fluorine has 9 electrons. How many electrons are present in its second energy level? A. 2 electrons B. 8 electrons C. 7 electrons D. 9 electrons