Semester Chemistry Review

The type of property in which the chemical composition or identity of the substance is changed.

• Homogeneous

• Diatomic

• Chemical

• Physical

Tags

NGSS.MS-PS1-2

What is the correct formula for calculating density?

• D = mass/particle size

• D = protons + neutrons

• D = mass/volume

• D = volume/mass

How do you determine the number of neutrons in an atom?

• mass - volume

• mass - protons

• protons + electrons

• atomic number - mass number

Which element has the symbol Br?

• boron

• beryllium

• bromine

• barium

How many different elements are in this chemical equation?

• 3

• 8

• 4

• 6

Tags

NGSS.MS-PS1-1

Compounds which have the same number of protons but different in the number of neutrons?

• isotopes

• ions

• isomers

• ionic

How do you determine the number of neutrons an element will have?

• Subtract the mass number from the atomic number

• Subtract the atomic number from the mass number

• Add the mass number to the atomic number

• Look at the atomic number

Which electrons are available for bonding?

• total electrons

• valence electrons

• protons

• neutrons

Elements bond because they are

• trying to look cool

• trying to become metallic

• trying to become stable

• trying to pass chemistry

Elements filling their valence shell is which rule?

• Octet rule

• HONC rule

• Lewis rule

• Valence rule