AnswersTN-Physical Science SC 26-27 For CreditAtomic Theory

Atoms Answers

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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.

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A
It contains most of the mass.
B
It is negatively charged.
C
It is mostly empty space.
D
It is composed of electrons.
2
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How does an atom change if all of its electrons are removed?

A
The atom’s volume increases.
B
The atom’s mass increases.
C
The atom becomes positively charged.
D
The atom becomes negatively charged.
3

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

A
The positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud.
B
The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
C
The negative charge of the neutrons in the nucleus equals the positive charge in the electron cloud.
D
The negative charge of the protons in the nucleus equals the positive charge in the electron cloud.
4

What is the main difference between protons and neutrons?

A
Protons have a much smaller mass than neutrons.
B
Protons have a much larger volume than neutrons.
C
Protons have an electrical charge, but neutrons have no charge.
D
Protons make up the nucleus, but neutrons orbit around the nucleus.
5

What is most likely true of an atom with a mass of 15 amu?

A
There are 15 protons.
B
There are 15 electrons.
C
The total number of protons and electrons is 15.
D
The total number of protons and neutrons is 15.
6

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.

Question illustration
A
4 amu
B
6 amu
C
10 amu
D
14 amu
7

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?

Question illustration
A
with “Inside the nucleus,” because the particle is a proton
B
with “Inside the nucleus,” because the particle is a neutron
C
with “Outside of the nucleus,” because the particle is a proton
D
with “Outside of the nucleus,” because the particle is an electron
8

What do an electron and a neutron have in common?

A
Each particle has a mass of 1 amu.
B
Each particle exists inside an atom.
C
Each particle has an electrical charge.
D
Each particle is located in the nucleus.
9

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

Question illustration
A
Is negatively charged
B
Has mass of 1 amu
C
Orbits the nucleus
D
Is positively charged

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