WAEC Past Questions and Answers - Page 1468

7,336.

Which of the following elements has the electronic configuration:1s22s22p63s23p1? [11Na, 13A1,
14N,16S]

A.

Al

B.

Na

C.

N

D.

S

Correct answer is A

No explanation has been provided for this answer.

7,337.

How many orbitals are associated with the p-sub energy level?

A.

2

B.

3

C.

5

D.

6

Correct answer is B

No explanation has been provided for this answer.

7,338.

Consider the reaction represented by the equation: 23892U + 10139 56Ba + 94 36Kr + 31 0n. The reaction represents a

A.

nuclear fission

B.

nuclear fusion

C.

radioactive decay

D.

spontaneous disintegration

Correct answer is A

No explanation has been provided for this answer.

7,339.

If 100 atoms of element X contains 70 atoms of 9X and 30 atoms of 11X, calculate the relative atomic mass of X

A.

9.6

B.

10.6

C.

11.6

D.

20.0

Correct answer is A

No explanation has been provided for this answer.

7,340.

How many protons does 4020Ca contain?

A.

20

B.

30

C.

40

D.

60

Correct answer is A

No explanation has been provided for this answer.