How many neutrons are present in this isotope of copper?

copper-63. You'll need to reference a periodic table for this.

• 29

• 34

• 63

• 92

When atoms join, what is their goal?

• an even number of electrons

• an outermost energy level that is full of electron

• an equal number of protons as electrons

• an equal number of protons as neutrons

The name of an atom that has gained or lost an atom is _____.

• bond

• ion

• covalent

• ionic

How many neutrons are found in this isotope of uranium? (You'll have a periodic table on the exam.) uranium-238

• 92

• 146

• 238

• 330

Identify the element that is NOT diatomic.

• Oxygen

• Sulfur

• Iodine

• Hydrogen

What does a subscript represent?

• Number of molecules of that element in the compound

• Number of atoms of that element in the compound

• Number of elements in the compound

• Number of valence electrons in that compound

Tags

NGSS.MS-PS1-1

What does a coefficient represent?

• Number of molecules of that substance

• Number of atoms of that element

• Number of elements in the compound

• Number of valence electrons in that compound

Tags

NGSS.MS-PS1-5

In an equation, such as NaOH + HCl (arrow) NaCl + H₂O, the substances on the left side of the arrow are called a….

• Reactants

• Products

• Yield

• Ingredients

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical equation, the substances found on the right side of the arrow are called the….

• Reactants

• Products

• Yield

• Outcome

Tags

NGSS.MS-PS1-5

In a chemical equation, the arrow’s proper name is a __________ sign.

• reactant

• product

• yield

• stop