Across
1
Mass per unit volume
5
Smallest unit of an element
6
Measure of matter in an object
7
Particle of light
Down
2
Curved glass that refracts light
3
Chemical element in table salt
4
Unit of electric potential
5
Substance with pH below 7
Mass per unit volume
Smallest unit of an element
Measure of matter in an object
Particle of light
Curved glass that refracts light
Chemical element in table salt
Unit of electric potential
Substance with pH below 7