Atomic Structure

The basic unit of matter is
1. element
2. atom
3. molecule
4. electron
The subatomic particle revolve around the nucleus is
1. atom
2. neutron
3. electron
4. proton
________is positively charged
1. proton
2. electron
3. molecule
4. neutron
The atomic number of an atom is
1. number of neutrons
2. number of protons
3. total number of protons and neutrons
4. number of atoms
Nucleons comprises of
1. protons and electrons
2. neutrons and electrons
3. protons and neutrons
4. neutron and positron
The outermost orbit of magnesium contains ___________ electrons
1. 2
2. 4
3. 6
4. 8
The number of electrons present in the outermost orbit is
1. valency
2. sub atomic particle
3. isotope
4. isobar
The atomic name for iron is
1. I
2. F
3. Fe
4. Ir
________is surrounded by electrons
1. protons
2. atoms
3. nucleus
4. neutrons
The number of electrons or protons present in an atom is called
1. atomic number
2. valency
3. isotope
4. isobar