(a(i))[1]
For each description below, name a Period 2 element (lithium to neon) that fits it. An element may be used once, more than once, or not at all. an element that is a gas at room temperature and pressure
(a(ii))[1]
an element whose oxide is a reactant in photosynthesis
(a(iii))[1]
an element that is formed as a product of photosynthesis
(a(iv))[1]
an element that accounts for approximately 78% of air by volume
(a(v))[1]
an element whose atoms have a complete outer shell of electrons
(a(vi))[1]
an element that occurs as both diamond and graphite
(a(vii))[1]
an element that reacts very vigorously with cold water
(a(viii))[1]
a soft metallic element kept in oil
(b(i))[1]
State the formula of a compound made only from boron and oxygen.
(b(ii))[1]
State the formula of a compound made only from lithium and nitrogen.