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Atomic Theory

Authored by Kyra Starr Reynolds

Physics

8th Grade

NGSS covered

Used 14+ times

Atomic Theory
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11 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Bohr's model of the atom proposed that ___.

electrons move around the nucleus in fixed orbits
neutrons move around the nucleus
neutrons do not exist, but are just paired protons and electrons
the nucleus spins

2.

MULTIPLE CHOICE QUESTION

45 sec • 12 pts

Media Image

Order the atomic models below from the oldest to the most recent.

2, 1, 3, and 4

1, 2, 4, and 3

3, 2, 4, and 1

3, 1, 2, and 4

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

One of the Dalton's conclusions concerning his atomic theory was that all the atoms of the same element are ___.

the same
different
combined
reacted

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which atomic model has a positively charged nucleus and a negatively charged cloud of electrons giving the atom its size?

Modern Model
Plum-pudding Model
Planetary Model
Marble Model

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which statement is true according to current thinking?

An atom is mostly empty space.
An atom is a collection of particles, so tightly packed that there is little empty space.
The atomic nucleus is very mobile, and moves around inside a cloud of electrons.
The size of atoms changes over time, pulsating from large to small to large again.

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following correctly describes the electron cloud model?

Electrons do not follow fixed orbits, but are found more frequently in areas around the nucleus.
Electrons are found in fixed orbitals around a positive nucleus.
All of an atom's mass is concentrated in the electron cloud around the nucleus.
Electrons are evenly embedded throughout a positively charged sphere.

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

According to modern atomic theory, electrons are found ___.

occupying unspecified regions around the nucleus, based on how much energy each electron has
in totally random and varying orbits around the nucleus
in fixed orbits at well-defined distances from the nucleus
closely attached to the nucleus

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