Carbon has mass number of 12. It has protons and neutrons………
a) 6,6
b) 12,6
c) 12,12
d) 6,12
The nucleus of an atom contains………
a) protons, electrons and neutrons
b) electrons and protons
c) protons and electrons
d) protons and neutrons
Protons carry………
a) positive charge
b) negative charge
c) no charge
d) zero charge
The atomic number of an element tells the number of ………
a) electrons and neutrons
b) protons only
c) protons and neutrons
d) neutrons only
If the atomic mass of nitrogen is 14, and it has 7 neutrons. How many electrons does a nitrogen atom have?
a) 8
b) 6
c) 14
d) 7
The mass number of an atom is represented by
a) A
b) B
c) Z
d) M
