Answers CR Physical Science Sem. 1Atomic Theory

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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.

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Roberto creates an animation titled “Flying through an Atom.” The animation makes it seem as if the viewer passes all the way through an atom, starting from one side, then through the atom’s center, and then leaving through the other side.What is the best description of the order of events in the animation?

The viewer travels through the electron cloud, then the protons, and then the nucleus.

The viewer travels through the nucleus, then the electron cloud, and then the nucleus again.

The viewer travels through the electron cloud, then the neutrons, and then the protons.

The viewer travels through the electron cloud, then the nucleus, and then the electron cloud again.

Two red and two overlapping balls in the center are surrounded by a green, fuzzy, circular cloud with a white line running through it. Two green balls sit on the white line, and a line leading a bracket around the balls is labeled A. A line leading to a bracket overlapping the white line is labeled B.

It contains most of the mass.

It is negatively charged.

It is mostly empty space.

It is composed of electrons.

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.

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.

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.

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.

A blue circle labeled proton and A overlaps a pink circle labeled neutron and C. The overlap is labeled B.

Is negatively charged

Has mass of 1 amu

Orbits the nucleus

Is positively charged

best

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.

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.

Which part of an atom is mostly empty space?

nucleus

proton cloud

electron cloud

neutron

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. 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.

best

The viewer travels through the electron cloud, then the protons, and then the nucleus.

The viewer travels through the nucleus, then the electron cloud, and then the nucleus again.

The viewer travels through the electron cloud, then the neutrons, and then the protons.

The viewer travels through the electron cloud, then the nucleus, and then the electron cloud again.

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

best

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

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

least

electron

proton

neutron

the atom

Which subatomic particle has the least mass?

electron

proton

neutron

the atom

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