Question

What is an example of an atomic number practice problem?

Answer 1

1.How many electrons, protons and neutrons are there in the following atoms:

a. 40Ca- 20 e-, 20 protons, 20 neutrons

b. 119Sn - 50 e-, 50 protons, 69 neutrons

c. 244Pu - 94 e-, 94 protons, 150 neutrons

2.What are the mass numbers for the following atoms:

a. beryllium with 5 neutrons- 9

b. titanium with 26 neutrons- 48

c. gallium with 39 neutrons - 70

3.Give the atomic symbol for each of the following elements.

a. sodium with 12 neutrons

b. argon with 21 neutrons

c. lead with 126 neutrons

4.How many protons, neutrons and electrons are contained in a neutral ruthenium-101 atom?

44 protons, 57 neutrons, 44 electrons