Graduation of elements on the periodic table

Correct the equation:

MgO + H₂O -----------> ...........................

• Mg(OH)

• Mg₂ +(OH)₂

• Mg(OH)₂

• 2Mg(OH)

Picometer = ..........

• 1 × 10 ^-2

• 1 × 10 ²

• 1 × 5²

• 2 × 9²

Element ............ reacts instantly with water

• Calcium

• Magnesium

• Sodium

• Copper

CO₂ + H₂O --------------> .......................

• HCO

• H ₂ CO ₃

• H ₂ Co ₃

• HCO₂

Atomic radius ........... in the group

Electronegativity ............... in the period

• Increases

• Decreases

............. are metal oxides

• Basic oxides

• Acidic oxides

• alkaline oxides

Cross the odd one out:

• Zinc

• Potassium

• Magnesium

• Copper

.............. oxide turns litmus solution into red

• CO ₂

• Na ₂ O

• MgO

• SO ₂

........... is an ion of nonmetallic element

• Negative ion

• Positive ion