CHEMICAL BOND (5.1 and 5.2)

The diagram shows the electron arrangement of Y ion. What is the number of valence electrons in Y atom?

• 1

• 2

• 6

• 8

The proton numbers of neon and argon are 10 and 18 respectively. State the electron arrangement of neon and argon.

The electron arrangements of atoms P = 2.8.2, Q = 2.8.7 and R = 2.8.8 are given respectively. Atom ____ is chemically inert.

The electron arrangements of atoms P = 2.8.2, Q = 2.8.7 and R = 2.8.8 are given respectively. Atoms ___ and ___ can take part in a chemical bonding.

Which of the following statement does not describe an inert gas?

• Its outermost shell is completely filled with electrons.

• It cannot accept, lose or share electrons.

• It exists as monoatomic gas.

• It can only form bonds with one another.

Chemical bonds cannot be formed by

• donating of electrons

• sharing of protons

• transferring of electrons

• sharing of electrons

The proton number of element P is 13 while element Q is located in Period 2 and Group 16 of the Periodic Table. Which type of compound is formed between element P and element Q?

• Ionic compound

• Covalent compound

• Positive compound

• Metal

Element P and element Q have proton number of 19 and 8 respectively. What is the relative formula mass of a compound formed between P and Q? [RAM : P = 39, Q = 16]

• 39

• 55

• 71

• 94

The diagram above gives information on elements X and Y.

Which of the following is the electron arrangement of the compound formed when element X and Y react?

• 
• 
• 
• 

Element M is an element from Group 13 and element X is an element from Group 16 in the Periodic Table. What is the formula of the compound formed between element M and element X?

• M₃X₂

• MX

• M₂X₃

• X₃M₂