Middle 1 atomic group

write your name

all the following are divalent metals except ................

• zinc Zn
• calcium Ca
• magnesium Mg
• sodium Na

all the following are monovalent non metals except .........

• fluorine F
• chlorine Cl
• oxygen O
• bromine Br

which of the following is trivalent non metal

• sulphur S
• iodine I
• nitrogen N

all the following are negative atomic group except ................................

• nitrate NO3
• hydroxide OH
• ammonium NH4

all the following are divalent atomic group except ..........

• phosphate PO4
• sulphate SO4
• carbonate CO3
• sulphite SO3

the chemical formula of chlorite is ....................

• ClO2
• ClO3

the chemical formula of nitrite is .....................

• NO3
• NO2

chemical formula of bicarbonate is .....................

• HCO2
• HCO3

chemical formula of hydroxide is .....................

• H2O
• HO
• OH