L2 Basic Science

Which particle is responsible for the valence of atoms?

What magic number comes next after 2, 8, 8 ?

Which is the only element to have no neutrons ?

Acid + base = Salt + ?

Two particles have the same mass, pick one of them.

Which group has 8 electrons in their outer orbits?

Who proposed the first theory of the atom?

If an element is in group 6, what will be the charge on the ion?

Atomic orbitals are grouped into .......... ?

What type of scale is the pH scale?

What type of bonding is formed between fibres?

If an atom has 8 electrons, what is most likely to be its atomic mass?

Which block contains the alkali metals group?

What type of bonding is formed in sodium chloride?

All organic acids contain which chemical group?

The f block contains which group?

Isotopes have different numbers of which particles?

Why do double decomposition reactions occur?

Which of the following is NOT an organic acid?

What name do we give to the columns of the periodic table?