Page 220 - Science Course 1 (Book 1)

Mo6-L3: Lesson Review Quiz (Matching)

Directions: On the line before each definition, write the letter of the term that matches it correctly. Each term
is used only once.

Matching Set 1 A. electron
B. neutron
1. positively charged particle in the nucleus of an atom C. proton

2. negatively charged particle that occupies the space in an atom outside the nucleus

3. uncharged particle in the nucleus of an atom D. nucleus
E. ion
Matching Set 2 F. isotope

4. one of two or more atoms of an element that have different numbers of neutrons

5. region at the center of an atom

6. an atom that has a positive or negative charge

Mo6-L3: Lesson Review Quiz (Multiple Choice)

Directions: On the line before each question or statement, write the letter of the correct answer.

7. An element’s atomic number tells how many _______ are in the nucleus of an atom of that element.

A. protons
B. neutrons
C. electrons
8. Where is an atom’s electron cloud located?

A. inside the nucleus
B. outside of the atom
C. surrounding the nucleus
9. An element’s atomic number tells the number of

A. isotopes it forms.
B. protons in the nucleus.
C. particles in the nucleus.
D. electrons it gains to form an ion.

10. In an atom, electrons
A. are paired with protons.
B. are found within the nucleus.
C. stay in a region called the electron cloud.

D. orbit the nucleus like planets around the Sun

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