Quiz: Atoms & Energy Quiz


Atoms & Energy QuizOnline version Atoms, energy, and models. by nada ashraf 1 What does the atomic number represent? a The number of neutrons b The total of protons and neutrons c The number of protons d The number of electrons 2 The mass number is equal to which of the following? a Protons plus electrons b Neutrons only c Protons only d Protons plus neutrons 3 For a neutral atom, which quantity equals the number of electrons? a The number of protons b The atomic number plus neutrons c The mass number d The atomic number minus protons 4 An atom has 9 protons and 10 neutrons. Its mass number is which value? a 29 b 18 c 19 d 9 5 Rutherford’s model showed that the atom is mostly what? a Empty space with a small nucleus b A solid sphere c A uniformly distributed charge d Entirely empty with no nucleus 6 Which scientist proposed the plum pudding model? a Bohr b Rutherford c Thomson d Chadwick 7 Bohr proposed that electrons occupy what? a Inside the nucleus b Constantly moving with no levels c Specific energy levels d Anywhere around the nucleus 8 What determines the color of light released by an atom? a Size of the atom b Energy difference between energy levels c Number of protons d Number of neutrons 9 What happens when an electron falls from a higher to a lower energy level? a It disappears b It becomes a proton c It releases energy as light d It absorbs energy 10 Which statement is true about elements and electron energy changes? a All elements have identical energy changes b Each element has its own characteristic pattern of electron energy changes c Energy changes are random and uniform across elements d Elements have no energy changes Feedback 1 Atomic number equals the count of protons in an atom. 2 Mass number = protons + neutrons. 3 Neutral atoms have equal numbers of protons and electrons. 4 Mass number = protons 9 + neutrons 10 = 19. 5 Rutherford found most of the atom’s mass in a tiny nucleus; space is mostly empty. 6 Thomson proposed the plum pudding (cake) model. 7 Bohr’s model has electrons in defined energy levels. 8 Different energy gaps emit different colors of light. 9 Electron transitions to lower levels emit photons (light). 10 Different elements show unique emission/absorption patterns.

1

What does the atomic number represent?

a

The number of neutrons

b

The total of protons and neutrons

c

The number of protons

d

The number of electrons

2

The mass number is equal to which of the following?

a

Protons plus electrons

b

Neutrons only

c

Protons only

d

Protons plus neutrons

3

For a neutral atom, which quantity equals the number of electrons?

a

The number of protons

b

The atomic number plus neutrons

c

The mass number

d

The atomic number minus protons

4

An atom has 9 protons and 10 neutrons. Its mass number is which value?

a

29

b

18

c

19

d

9

5

Rutherford’s model showed that the atom is mostly what?

a

Empty space with a small nucleus

b

A solid sphere

c

A uniformly distributed charge

d

Entirely empty with no nucleus

6

Which scientist proposed the plum pudding model?

a

Bohr

b

Rutherford

c

Thomson

d

Chadwick

7

Bohr proposed that electrons occupy what?

a

Inside the nucleus

b

Constantly moving with no levels

c

Specific energy levels

d

Anywhere around the nucleus

8

What determines the color of light released by an atom?

a

Size of the atom

b

Energy difference between energy levels

c

Number of protons

d

Number of neutrons

9

What happens when an electron falls from a higher to a lower energy level?

a

It disappears

b

It becomes a proton

c

It releases energy as light

d

It absorbs energy

10

Which statement is true about elements and electron energy changes?

a

All elements have identical energy changes

b

Each element has its own characteristic pattern of electron energy changes

c

Energy changes are random and uniform across elements

d

Elements have no energy changes

Feedback

1

Atomic number equals the count of protons in an atom.

2

Mass number = protons + neutrons.

3

Neutral atoms have equal numbers of protons and electrons.

4

Mass number = protons 9 + neutrons 10 = 19.

5

Rutherford found most of the atom’s mass in a tiny nucleus; space is mostly empty.

6

Thomson proposed the plum pudding (cake) model.

7

Bohr’s model has electrons in defined energy levels.

8

Different energy gaps emit different colors of light.

9

Electron transitions to lower levels emit photons (light).

10

Different elements show unique emission/absorption patterns.

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Atoms & Energy Quiz

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Atoms & Energy QuizOnline version

by nada ashraf

What does the atomic number represent?

The mass number is equal to which of the following?

For a neutral atom, which quantity equals the number of electrons?

An atom has 9 protons and 10 neutrons. Its mass number is which value?

Rutherford’s model showed that the atom is mostly what?

Which scientist proposed the plum pudding model?

Bohr proposed that electrons occupy what?

What determines the color of light released by an atom?

What happens when an electron falls from a higher to a lower energy level?

Which statement is true about elements and electron energy changes?

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