Which of the following is NOT part of John Dalton's atomic theory?

Atoms contain subatomic particles

All elements are composed of atoms

All atoms of the same element have the same mass

A compound contains atoms of more than one element

In Rutherford's gold foil experiment, what caused some of the alpha particles to bounce straight back from the gold foil?

negative charges in the gold atoms

In an atomic model that includes a nucleus, the positive charge is

concentrated in the center of an atom

Spread evenly throughout an atom

concentrated at multiple sites in an atom

located in the space outside the nucleus

Which statement about subatomic particles is NOT true?

protons and neutrons have the same charge

protons and neutrons have almost the same mass

protons and electrons have opposite charges

unlike protons and electrons, neutrons have no charge

To find the number of neutrons in an atom, you would subtract

atomic number from proton number

atomic number from electron number

isotope number from atomic number

In Niels Bohr's model of the atom, electrons move

like popcorn in a popcorn popper

like beach balls on water waves

What can you assume has happened if an electron moves to a higher energy level?

the atom has become more stable

Which of the following most accurately represents John Dalton's model of the atom?

a tiny, solid sphere with a predictable mass for a given element

a tiny, solid sphere with unpredictable mass for a given element

a hallow sphere with a dense nucleus

a sphere that is hollow throughout

Which statement is true about oxygen-17 and oxygen-18

they do not have the same number of protons

their atoms have an identical mass

Which statement about electrons and atomic orbitals is NOT true?

An electron has the same amount of energy in all orbitals

An orbital can contain a maximum of two electrons

An electron cloud represents all the orbitals in an atom

An atom's lowest energy level has only one orbital

The glowing of neon light is caused by electrons emitting energy as they

move from higher to lower energy levels

move from lower to higher energy levels

Chemistry Atoms

Authored by Charles Martinez

Chemistry

9th - 12th Grade

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

What subatomic particles would you find in the nucleus of an atom?

Protons only

Protons and Neutrons

Neutrons and Electrons

Protons and Electrons

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which subatomic particles contribute the most to the mass of an atom?

Protons, Neutrons, Electrons

Protons only

Protons and Electrons

Protons and Neutrons

Tags

NGSS.HS-PS1-8

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Protons and Electrons balance the charge of an atom.

True

False

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

12 neutrons

12 electrons

12 protons

24 protons and neutrons

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The mass of one proton is greater than the mass of one...

neutron

electron

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which letter represents a proton?

Tags

NGSS.MS-PS1-1

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Chemistry Atoms

What subatomic particles would you find in the nucleus of an atom?

Which subatomic particles contribute the most to the mass of an atom?

Protons and Electrons balance the charge of an atom.

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

The mass of one proton is greater than the mass of one...

Which letter represents a proton?

Which letter represents a neutron?

Which letter represents an electron?

Which letter represents the nucleus?

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