S1 Final Review Quiz

What is the difference between qualitative and quantitative observations?

• Qualitative observations involve numbers, while quantitative observations involve descriptions.

• Qualitative observations involve descriptions, while quantitative observations involve numbers.

• Both involve numbers.

• Both involve descriptions.

What is the value of 1 mole in terms of particles?

• 1 mole = 6.02 x 10^23 particles

• 1 mole = 3.01 x 10^23 particles

• 1 mole = 1.00 x 10^23 particles

• 1 mole = 9.02 x 10^23 particles

Which of the following is a chemical property?

• Density

• Color

• Reactivity

• Melting point

What is the law of conservation of mass?

• Mass can be created or destroyed in a chemical reaction.

• Mass is always lost in a chemical reaction.

• Mass is conserved; it is neither created nor destroyed in a chemical reaction.

• Mass is always gained in a chemical reaction.

Tags

NGSS.MS-PS1-5

What is the significance of the octet rule in chemistry?

• Atoms tend to gain, lose, or share electrons to have eight electrons in their outer shell.

• Atoms always have eight protons in their nucleus.

• Atoms tend to have eight neutrons in their nucleus.

• Atoms always form eight bonds.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What are some (at least three) signs of a chemical change?

• Sudden color change, sudden odor, bubbles

• Melting, freezing, boiling

• Dissolving, filtering, evaporating

• Stretching, compressing, bending

Tags

NGSS.MS-PS1-2

What is the difference between a physical change and a chemical change?

• Physical change is reversible; chemical change creates something new

• Physical change creates something new; chemical change is reversible

• Both are irreversible

• Both involve a change in chemical composition

Tags

NGSS.MS-PS1-5

What type of matter (element, compound, mixture) is NaCl?

• Element

• Compound

• Mixture

• Solution

Write the number 0.0000000056 in scientific notation.

• 5.6 x 10^-9

• 56 x 10^-8

• 5.6 x 10^9

• 0.56 x 10^-7

Write the number 4.53 x 10^10 in standard notation.

• 45300000000

• 4530000000

• 453000000000

• 453000000