Matter Worksheets
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Name _____________________________
Date ___________________
Structure of an Atom
Complete the puzzle.
123
4
5
67
8
9
101112
13
14

 

down 1.

The path that an electron takes as it moves around the nucleus.
down 3.

The mass of a proton is approximately ____ to the mass of a neutron.
down 4.

A ____ atom has the same number of protons and electrons.
down 6.

These move around an atom's nucleus and have a negative electric charge.
down 7.

An atom with more protons than electrons has a ____ charge.
down 9.

The mass of a proton is more than 1,800 times ____ than the mass of an electron.
down 10.

The central part of an atom.
down 12.

One of the two particles that make up a nucleus. This has no electric charge.
across 2.

The mass of a electron is more than 1,800 times ____ than the mass of an proton.
across 5.

Atoms, which are the same element and have the same number of protons, but have different numbers of neutrons.
across 8.

One of the two particles that make up a nucleus. This has a positive electric charge.
across 11.

The ____ between negative and positive protons help to maintain an atom's structure.
across 13.

An atom with more electrons than protons has a ____ charge.
across 14.

The majority of an atom is empty ____.

 

Answer Key
1O
2L
3E
SS
RQ
B
4N
U
5I
SOTOPESA
TUL
6E
7P
8P
ROTONLO
R
9G
ES
10N
11A
TTRACTIO
12N
ULETTE
CARIU
LTOVT
13N
EGATIVENER
URSO
14S
PACEN