Final Review #1

In the periodic table shown, which sequence lists these blocks in s, p, d, f order?

• A. 1, 2, 3, 4

• B. 4, 1, 2, 3

• C. 4, 3, 1, 2

• D. 4, 1, 3, 2

What do the dots represent in the Lewis dot structure for methane?

• all the electrons on the carbon atom

• the valence electrons of the hydrogen atoms

• the valence electrons of the carbon atom

• the valence electrons of both the carbon and hydrogen atoms

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NGSS.MS-PS1-1

Based on this information, which statement comparing a helium atom and a hydrogen atom is correct?

• The diameter of a helium atom is approximately 4 times that of a hydrogen atom.

• The mass of a helium atom is approximately 4 times that of a hydrogen atom.

• The mass of a helium atom is approximately 3 times that of a hydrogen atom.

• The diameter of a helium atom is approximately 3 times that of a hydrogen atom.

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NGSS.MS-PS1-1

How many neutrons does the most common isotope of fluorine have?

• 9

• 10

• 17

• 19

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NGSS.MS-PS1-1

Which of the following did this experiment demonstrate?

• The nucleus occupies about half of the volume of an atom.

• Almost all the volume of an atom consists of empty space.

• Atoms can be eroded when bombarded with alpha particles.

• The atomic nucleus is surrounded by a thick substance.

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NGSS.HS-PS1-8

Which element has the same number of electrons available for bonding as magnesium?

• calcium

• sodium

• manganese

• aluminum

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does helium (He) have?

• 1

• 2

• 8

• 18

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NGSS.HS-PS1-1

Which of the following element has 4 electrons in its outermost orbital?

• F

• Mg

• Si

• Ne

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NGSS.HS-PS1-1

For the electron configurations 3p^2, which of the following describes the number of electrons in the given orbital?

• 3

• 2

• p

• none of the above

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NGSS.HS-PS1-1

Which of the following electron configurations describes an element that is a noble gas?

• 1s²2s²2p⁴

• [Ne]2s²2p²

• [Ar]3s¹

• 1s²2s²2p⁶

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NGSS.HS-PS1-1