Chemical bond

which atom form a cation?

• oxygen

• chlorine

• sodium

• sulphur

the snail shell contains a natural ionic compound. other than oxygen, what elements are contained in the ionic compound of snail shell?

• carbon and hydrogen

• calcium and carbon

• calcium and hydrogen

• sodium and carbon

which compound is formed by transferring electrons?

• Oxygen,O₂

• Carbon monoxide, CO

• Sodium oxide, Na₂O

• Sulphur trioxide, SO₃

Element X reacts with sulphur to form a compound with formula X₂S. What is the correct electron arrangement of X? [Proton number :S=16]

• 2.8.3

• 2.8.1

• 2.8.2

• 2.8.4

Element J and element Q have proton number 12 and 9 respectively.What is the relative formula mass of a compound formed between element J and Q? [Proton number: J =24, Q=19]

• 30

• 43

• 62

• 67

Which of the following represents the electron arrangement for the compound sodium chloride,NaCl ?

• 
• 
• 
• 

Butane in cooking gas burns to release carbon dioxide. Both butane and carbon dioxide are

• ionic compound

• covalent compound

• inorganic compound

• hydrocarbon compound

Which molecule has a double covalent bond between its atom. [Proton number: H=1, N=7, O=8, F=9 ]

• Hydrogen

• Nitrogen

• Fluorine

• Oxygen

What is dative bond?

• A bond formed when an electron pair that is shared comes from one atom only

• A bond formed when one atom donates its electron(s) and another atom receives the electron(s)

• A bond formed when at least two atoms share electrons

How can dative bond form in hydroxonium ion H₃O⁺?

• The pair of electrons not involved in covalent bond in water molecule, H₂O will be shared with hydrogen ion H⁺

• Water molecule, H₂O and hydrogen ion, H⁺ will each share one electron

• Water molecule, H₂O and hydrogen ion, H⁺ will each share two electrons

Tags

NGSS.HS-PS1-2