Skip to content
OtisamLMS
Sign in Sign up
Chemistry

Chemistry · Quick practice · answer shown after each question

Atomic structure and periodicity

Question 1 of 10

Question 1 of 10

Elements in the same group of the periodic table have the same number of

Question 2 of 10

Question 2 of 10

Which has the largest ionic radius?

Question 3 of 10

Question 3 of 10

Which of the following elements is an alkali metal?

Question 4 of 10

Question 4 of 10

The atomic (proton) number tells us how many of which particle are in an atom?

Question 5 of 10

Question 5 of 10

The electron configuration of sodium (Z = 11) is

Question 6 of 10

Question 6 of 10

An atom has 17 protons and 18 neutrons. Its mass number is

Question 7 of 10

Question 7 of 10

How many electrons can the second shell hold?

Question 8 of 10

Question 8 of 10

Which pair are isotopes?

Question 9 of 10

Question 9 of 10

The first ionisation energy of magnesium is higher than that of sodium because magnesium has

Question 10 of 10

Question 10 of 10

Elements in the same group have the same number of

Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.