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This quiz contains 17 questions from a mix of 1 subtopics.

Atoms consist of a central containing protons and . The nucleus is surrounded by arranged in energy levels (also called shells). Atoms have no electric charge because they contain the same number of and electrons.

nucleus
neutrons
electrons
protons

0

/

4

What is the relative mass of a neutron?

0

0.0005

1

2

0

/

1

What is the charge of a proton?

-1

0

+1

0

/

1

are neutral, so have a charge of 0.

Neutrons

0

/

1

What is the charge of an electron?

-1

0

+1

0

/

1

What do we call the number labelled above?

atomic

number

number

0

/

1

Atoms and ions of the same element always have the same number of .

protons

0

/

1

The mass number tells you the number of and neutrons in the of the atom.

protons
nucleus

0

/

2

number = number of protons

Atomic

0

/

1

Using the nuclear symbol given above, fill in the following missing values:


Atomic number:


Number of protons:

19
19

0

/

2

Using the nuclear symbol given above, work out the number of electrons.

19

0

/

1

Using the nuclear symbol given above, fill in the following missing values:


Mass number:


Number of neutrons:

39
20

0

/

2

Table showing the nuclear symbol of uranium-235 with columns for atomic number, mass number, number of protons, number of neutrons, and number of electrons.

The above nuclear symbol represents uranium-235, fill in the missing values:


Atomic number:

Mass number:

Number of protons:

Number of neutrons:

Number of electrons:

92
235
92
143
92

0

/

5

Table showing the nuclear symbol of uranium-238 with missing mass number and number of neutrons.

The above nuclear symbol represents uranium-238, fill in the missing values:


Mass number:

Number of neutrons:

238
146

0

/

2

Using the data in the table above, work out the missing values.

Atom or ion:

Number of electrons:

ion
10

0

/

2

Using the data in the table above, work out the missing values.

Atom or ion:

Number of electrons:

ion
18

0

/

2

Table showing a calcium ion with atomic number 20 and a missing number of electrons.

Using the data in the table above, work out the missing values.

Number of electrons:

18

0

/

1