What can the period tell you about the electrons in an atom?

How many electron shells there are

How did the scattering experiment show that most of an atom was empty space?

Most of the alpha particles passed through the gold foil without being deflected.

The alpha particles were all absorbed by the gold foil.

The alpha particles changed color after passing through the gold foil.

The alpha particles bounced back in the opposite direction after hitting the gold foil.

Which answer best explains why reactivity increases as we move down group 1?

The outermost electron is further away from the nucleus. Less attraction between outer electron and nucleus. There is also more electron shielding, so electrons are easier to lose

The outermost electron is closer to the nucleus, so there are stronger attractions between protons and outer electrons, making it easier to lose electrons.

The outermost electron is further away from the nucleus, making attractions between protons and outer electrons stronger, making it harder to lose electrons.

The outermost electron is closer to the nucleus, making it harder to lose.

Why is the overall charge on an atom zero?

There is an equal number of protons and electrons

There is an equal number of protons and neutrons

There is an equal number of neutrons and electrons

Atomic structure

7th - 12th Grade

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30 Qs

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Chemistry, Physics

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7th - 12th Grade

•

Practice Problem

•

Medium

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NGSS

HS-PS1-1, HS-PS1-2, MS-PS1-1

Standards-aligned

Alex Moon

Used 46+ times

FREE Resource

30 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the atomic number of an atom?

The number of protons

the number of neutrons

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mass number of an atom?

The number of neutrons

The number of protons + neutrons

The number of protons + electrons

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How are the electrons arranged in atoms?

In the nucleus

In shells around the atom

Randomly around the nucleus

How many electrons can go in the first shell?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many electrons can go in the second and third shells?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are groups in the periodic table?

The left and right "rows"

the up and down "columns"

What can the group tell you about the electrons in an atom?

How many electrons there are in total

How many electrons are in the first shell

How many electrons are on the outer shell

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Atomic structure

30 questions

What is the atomic number of an atom?

What is the mass number of an atom?

How are the electrons arranged in atoms?

How many electrons can go in the first shell?

How many electrons can go in the second and third shells?

What are groups in the periodic table?

What can the group tell you about the electrons in an atom?

What are periods in the periodic table?

What can the period tell you about the electrons in an atom?

How many electrons does calcium have?

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