The mass number of elements practice exercise 4

A contractor in Nairobi tests an iron atom used in steel. If the atom has 26 protons and 30 neutrons, what is its mass number?

A contractor in Nairobi tests an iron atom used in steel. If the atom has 26 protons and 30 neutrons, what is its mass number?  (1 mark)

A contractor in Nairobi tests an iron atom used in steel. If the atom has 26 protons and 30 neutrons, what is its mass number?  (1 mark)

A contractor in Nairobi tests an iron atom used in steel. If the atom has 26 protons and 30 neutrons, what is its mass number?  (1 mark)

A lab technician in Kisumu records an atom with 18 electrons, 18 protons, and 20 neutrons. What is the correct mass number of this atom?

A lab technician in Kisumu records an atom with 18 electrons, 18 protons, and 20 neutrons. What is the correct mass number of this atom?  (1 mark)

A lab technician in Kisumu records an atom with 18 electrons, 18 protons, and 20 neutrons. What is the correct mass number of this atom?  (1 mark)

A lab technician in Kisumu records an atom with 18 electrons, 18 protons, and 20 neutrons. What is the correct mass number of this atom?  (1 mark)

A farm chemistry lab in Kericho studies potassium’s role in banana ripening. Refer to the diagram of a potassium atom showing 19 protons and 20 neutrons. What is the mass number?

A farm chemistry lab in Kericho studies potassium’s role in banana ripening. Refer to the diagram of a potassium atom showing 19 protons and 20 neutrons. What is the mass number?  (1 mark)

A farm chemistry lab in Kericho studies potassium’s role in banana ripening. Refer to the diagram of a potassium atom showing 19 protons and 20 neutrons. What is the mass number?  (1 mark)

Neon gas is used in street lighting in Nairobi. The diagram below shows 10 protons and 10 neutrons. What is neon’s mass number?

Neon gas is used in street lighting in Nairobi. The diagram below shows 10 protons and 10 neutrons. What is neon’s mass number? (1 mark)

Neon gas is used in street lighting in Nairobi. The diagram below shows 10 protons and 10 neutrons. What is neon’s mass number? (1 mark)

Neon gas is used in street lighting in Nairobi. The diagram below shows 10 protons and 10 neutrons. What is neon’s mass number? (1 mark)

Neon gas is used in street lighting in Nairobi. The diagram below shows 10 protons and 10 neutrons. What is neon’s mass number? (1 mark)

Potassium helps ripen bananas in Kisii County. If a potassium atom has 19 protons and 20 neutrons, what is its mass number?

Potassium helps ripen bananas in Kisii County. If a potassium atom has 19 protons and 20 neutrons, what is its mass number?  (1 mark)

Potassium helps ripen bananas in Kisii County. If a potassium atom has 19 protons and 20 neutrons, what is its mass number?  (1 mark)

Potassium helps ripen bananas in Kisii County. If a potassium atom has 19 protons and 20 neutrons, what is its mass number?  (1 mark)

Sulfur is used in making fertilizers at the Yara plant in Eldoret. It has 16 protons and 16 neutrons. What is its mass number?

Sulfur is used in making fertilizers at the Yara plant in Eldoret. It has 16 protons and 16 neutrons. What is its mass number?  (1 mark)

Sulfur is used in making fertilizers at the Yara plant in Eldoret. It has 16 protons and 16 neutrons. What is its mass number?  (1 mark)

Sulphur is used in making fertilizers at the Yara plant in Eldoret. It has 16 protons and 16 neutrons. What is its mass number?  (1 mark)

Your teacher shows a diagram of an aluminum atom with 13 red protons and 14 beige neutrons in its nucleus. What is the atom’s mass number?

Your teacher shows a diagram below of an aluminum atom, which has 13 red protons and 14 beige neutrons in its nucleus. What is the atom’s mass number?  (1 mark)

Your teacher shows a diagram below of an aluminum atom, which has 13 red protons and 14 beige neutrons in its nucleus. What is the atom’s mass number?  (1 mark)

Your teacher shows a diagram below of an aluminum atom, which has 13 red protons and 14 beige neutrons in its nucleus. What is the atom’s mass number?  (1 mark)

A borehole sample from Kitui County contains atoms with 17 protons and 18 neutrons. What is the mass number of this element?

A borehole sample from Kitui County contains atoms with 17 protons and 18 neutrons. What is the mass number of this element?  (1 mark)

A borehole sample from Kitui County contains atoms with 17 protons and 18 neutrons. What is the mass number of this element?  (1 mark)

A borehole sample from Kitui County contains atoms with 17 protons and 18 neutrons. What is the mass number of this element?  (1 mark)

Magnesium helps strengthen maize stalks. The diagram shows a magnesium atom with 12 protons and 12 neutrons. What is its mass number?

Magnesium helps strengthen maize stalks. The diagram shows a magnesium atom with 12 protons and 12 neutrons. What is its mass number?  (1 mark)

Magnesium helps strengthen maize stalks. The diagram shows a magnesium atom with 12 protons and 12 neutrons. What is its mass number?  (1 mark)

Magnesium helps strengthen maize stalks. The diagram shows a magnesium atom with 12 protons and 12 neutrons. What is its mass number?  (1 mark)

Farmers in Uasin Gishu use phosphorus-based fertilizers. If a phosphorus atom has 15 protons and 16 neutrons, what is its mass number?

Farmers in Uasin Gishu use phosphorus-based fertilizers. If a phosphorus atom has 15 protons and 16 neutrons, what is its mass number? (1 mark)

Farmers in Uasin Gishu use phosphorus-based fertilizers. If a phosphorus atom has 15 protons and 16 neutrons, what is its mass number? (1 mark)

Farmers in Uasin Gishu use phosphorus-based fertilizers. If a phosphorus atom has 15 protons and 16 neutrons, what is its mass number? (1 mark)