Across
1
Fourth state of matter
3
Gas essential for breathing
5
Second lightest element
6
Center of an atom or cell
Down
1
Positive particle in nucleus
2
Solid with repeating atomic pattern
4
Unit of heredity
5
Form of thermal energy
Fourth state of matter
Gas essential for breathing
Second lightest element
Center of an atom or cell
Positive particle in nucleus
Solid with repeating atomic pattern
Unit of heredity
Form of thermal energy