Chemistry

Question 1

1First ionisation energy generally increases across a period.

Medium

A. True B. False

Question 2

2Sodium (Z = 11) is in period ___ of the periodic table.

Easy

Your answer (fill in the blank)

Question 3

3Elements whose outermost electron enters a d subshell belong to the

Easy

A. s-block B. d-block (transition elements) C. f-block D. p-block

Question 4

4Oxygen (Z = 8) is in period ___ of the periodic table.

Easy

Your answer (fill in the blank)

Question 5

5In which group of the periodic table is silicon (Z = 14)?

Easy

A. 14 B. 3 C. 13 D. 15

Question 6

6The modern periodic table arranges elements in order of increasing

Easy

A. atomic number B. density C. mass number D. number of neutrons

Question 7

7In which period of the periodic table is beryllium (Z = 4)?

Easy

A. 3 B. 2 C. 4 D. 1

Question 8

8Mendeleev left gaps in his table for undiscovered elements.

Easy

A. True B. False

Question 9

9Chlorine is more electronegative than iodine.

Easy

A. True B. False

Question 10

10In which group of the periodic table is magnesium (Z = 12)?

Easy

A. 1 B. 12 C. 3 D. 2