Atoms and Elements Multiple Choice Questions (MCQ) PDF Download

MCQ 1: The number of protons and electrons in an atom of uranium is

1. 90
2. 91
3. 92
4. 94

MCQ 2: As there are same number of electrons and protons in an atom, atomic number can also be called

1. electron number
2. proton number
3. nucleon number
4. mass number

MCQ 3: The smallest atom in 'periodic table' yet found is

1. hydrogen
2. helium
3. lithium
4. magnesium

MCQ 4: Atoms of different elements differ from each other because of

1. difference in color
2. difference in size
3. difference in shape
4. difference in particle numbers

MCQ 5: A material which is made up of one type of atom is known as

1. element
2. compound
3. mixture
4. molecule