SECTION B - THEORY Answer all
la Define (1) Atomic number (ii) Mass number
(4mks)
Elements x and y have the following electronic configurations
X - 152 2s 2p O
Y - 152 2s 2p 3s
Na​

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves

Aconversion factor is a ratio of equivalent values used to express the same units in different quantities