Unit 7 Test Review

Which atom has 3 neutrons?

• A. Li-6

• B. Li-7

• C. Li-8

• D. Li-9

Tags

NGSS.MS-PS1-1

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same

• that matter can only be changed into new substances by introducing a catalyst

• that matter exists in the same state throughout any chemical change

• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Tags

NGSS.MS-PS1-5

How many periods are on the periodic table?

• 12

• 7

• 9

• 18

True/False: The periodic table is grouped according to periodic law, which states that when elements are arranged by atomic number, elements with similar properties occur at regular intervals.

• True

• False

Which element can be found in period 3, group 17?

• B - Boron

• Br - Bromine

• Cl - Chlorine

• I - Iodine

When an atom loses an electron, it becomes a

• cation

• anion

• neutral atom

• isotope

An atom has 10 protons, 11 electrons, 12 neutrons. What is this atom called?

• neutral

• positive ion (Cation)

• negative ion (Anion)

• isotope

Tags

NGSS.MS-PS1-1

What are atoms of the same element with different numbers of neutrons called?

• ions

• radioactive

• neutral

• isotopes

Tags

NGSS.HS-PS1-8

What type of bond forms between two nonmetals?

• Ionic bond

• Covalent bond

• Metallic Bond

• Polyatomic

Why do noble gases NOT form compounds easily?

• A. They have full outer shells

• B. They have 7 valence electrons

• C. They just don’t like the other elements

• D. They need 2 more valence electrons