'The Atom' Chemistry Worksheet (Page 2 of 2) in pdf

Quiz Unit 2 Lesson 2-6: The Atom

Form

11. Which of these statements describes a fact about an atom’s nucleus?

A. It is negatively charged.

B. It is smaller than an electron.

C. It is made of neutrons and protons.

D. It is the same size in all atoms.

12. Which of these statements describes a fact about an

electron

cloud?

A. It is the most massive part of an atom.

B. It is made up of electrons and neutrons.

C. It is located in the center of an atom’s nucleus.

D. It is negatively charged.

13. An atom of the element gallium (Ga) has 31 protons and 39 neutrons.

What is the

atomic number

of gallium?

B. 31

C. 39

D. 70

14. Consider a banana and a lightsaber. What do these two objects always have in common?

A. Both are made of atoms.

B. Both have the same mass number.

C. Both are made of the same kind of atom.

D. Both are made of the same number of atoms.

15. An atom of rubidium has the atomic number 37 and a mass number of 87.

How many

neutrons

does this atom of rubidium have?

A. 50

B. 87

C. 37

D. 124

Extra Credit. 1 point each

EC1. Why is the mass of an atom’s electrons not included in the atom’s mass number?

A. The electrons move so fast that their mass cannot be measured.

B. The electrons’ negative charge cancels out their masses.

C. The electrons’ mass is represented in the atomic number.

D. The electrons are much less massive than the rest of the atom.

EC2. Calcium is an element. What is the smallest particle of calcium that has the same chemical properties of calcium?

A. an atom of calcium

B. a proton from a calcium atom

C. an electron from a calcium atom

D. a molecule that contains calcium

EC3. Atoms are the basic building block of items on Earth.

Atoms make up the elements that combine as molecules to make up much of what we use every day.

Which of these substances is not made out of atoms?

A. air

B. water

C. humans

D. protons

EC4. Which of these particles is the smallest?

A. an electron

B. a nucleus

C. an atom

D. a proton

EC5. Atoms with the same number of protons but different number of neutrons are called ___________.

A. Elements

B. Isotopes

C. Compounds

D. Atomic mass

'The Atom' Chemistry Worksheet Page 2

Related Articles

Related forms

Related Categories