Chemistry Pre-Test

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Tags

NGSS.MS-PS1-1

The left side of the equation below is called

• Products

• Reactants

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which two particles make up the nucleus of an atom?

• Protons and Electrons

• Protons and Neutrons

• Molecules and Compounds

• Neutrons and Electrons

The particles with no charge in an atom are the _______.

• electrons

• neutrons

• protons

• protons and neutrons

Tags

NGSS.MS-PS1-1

The positively charged particles of an atom are the ________.

• electrons

• protons

• neutrons

• protons & neutrons

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NGSS.MS-PS1-1

What are valence electrons?

• electrons on the first orbital always

• nucleus

• the outermost shell

• the number of electrons on the outermost orbital

An element with a mass number of 10 and an atomic number of 6 has how many neutrons?

• 6

• 8

• 4

• 10

SIDE TO SIDE rows on the periodic table are

• groups

• periods

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3

• 6

• 12

• 24

Tags

NGSS.MS-PS1-1