Across
1
Unit of heredity
4
Second lightest element
6
Disturbance that transfers energy
7
Smallest unit of an element
10
Magnetic metallic element
11
Gas essential for breathing
Down
2
Hottest planet in solar system
3
Substance with pH above 7
5
Reddish electrical conductor
8
Form of thermal energy
9
Naturally occurring inorganic solid
11
Path of a planet around the sun