General
✓✗Electronic configuration of calcium is
- 2, 8, 8
- 2, 8, 2
- 2, 8, 8, 2
- 2, 8, 8, 1
General
✓✗Which one of the following is not an isotope of Neon?
General
✓✗Atomic number is equal to
- Number of neutrons
- Total of protons and neutrons
- Number of electrons
- Number of protons
General
✓✗If an atom of an element combines by losing or gaining electrons then the valency is known as
- Electrovalency
- Covalency
- Both ‘a’ and ‘b’
- None of these
General
✓✗Absolute mass of an electron is
-
gm
-
gm
-
u
-
gm
General
✓✗What do X & Y represent in following picture?
- X - atomic number, Y - atomic mass
- X - atomic mass, Y - atomic number
- X - mass number, Y - atomic number
- X - number of electrons, Y - number of protons
General
✓✗An element X has mass number 22 & atomic number 10, the number of electrons, protons and neutrons will be
- e=10, p=10, n=12
- e=12, p=12, n=10
- e=10, p=12, n=10
- e=12, p=12, n=12
General
✓✗Rutherford’s gold foil experiment led to the discovery of
- Electrons
- Atom
- Neutrons
- Nucleus
General
✓✗Isobars are atoms of_____ elements having _____ atomic number and_____ atomic mass/number
- same, same, different
- different, same, same
- different, different, same
- same, different, different
General
✓✗Which one of the following is not an isotope of Oxygen?
