Answers FL-2003010-MJ Physical ScienceAtoms

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What is the main difference between protons and neutrons?

Protons have a much smaller mass than neutrons.

Protons have a much larger volume than neutrons.

Protons have an electrical charge, but neutrons have no charge.

Protons make up the nucleus, but neutrons orbit around the nucleus.

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Which part of an atom is mostly empty space?

nucleus

proton cloud

electron cloud

neutron

What is the mass of a neutron?

1/2,000 amu

1 amu

2,000 amu

1/200 amu

Which statement describes an atomic nucleus?

An atomic nucleus is negatively charged.

An atomic nucleus has no electrical charge.

An atomic nucleus consists of mostly empty space.

An atomic nucleus contains most of the atom’s mass.

Students are completing a table about a particular subatomic particle that helps make up an atom.What best explains how they should complete the table?

with “Inside the nucleus,” because the particle is a proton

with “Inside the nucleus,” because the particle is a neutron

with “Outside of the nucleus,” because the particle is a proton

with “Outside of the nucleus,” because the particle is an electron

At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line.

4 amu

6 amu

10 amu

14 amu

How does an atom change if all of its electrons are removed?

The atom’s volume increases.

The atom’s mass increases.

The atom becomes positively charged.

The atom becomes negatively charged.

What do an electron and a neutron have in common?

Each particle has a mass of 1 amu.

Each particle exists inside an atom.

Each particle has an electrical charge.

Each particle is located in the nucleus.

Students are completing a table about a particular subatomic particle that helps make up an atom. The students have filled in one cell of the table so far.Based on the information shown, which statement about the subatomic particle must be correct?

Its location is in the nucleus, because the particle is a proton or a neutron.

Its location is in the nucleus, because the particle is a neutron or an electron.

Its charge is +1, because the particle is a proton.

Its charge is 0, because the particle is a neutron.

Which statement best explains why the overall charge on an atom is zero?

The positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud.

The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.

The negative charge of the neutrons in the nucleus equals the positive charge in the electron cloud.

The negative charge of the protons in the nucleus equals the positive charge in the electron cloud.

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