Quiz: Laws and Atoms

What does the law of conservation of matter state?

• Matter can be created from energy.
• Matter can be destroyed in chemical reactions.
• Matter cannot be created or destroyed, only transformed.
• Matter exists in a fixed amount in the universe.

Tags

NGSS.MS-PS1-5

What does the law of multiple proportions state?

• The law of multiple proportions states that compounds can only be formed by two elements in equal amounts.
• The law of multiple proportions states that the mass of one element is always equal to the mass of the other element.
• The law of multiple proportions states that elements can only combine in one fixed ratio.
• The law of multiple proportions states that when two elements form multiple compounds, the mass ratios of one element that combine with a fixed mass of the other are in small whole number ratios.

Tags

NGSS.HS-PS1-7

What does the law of definite proportion state?

• A chemical compound can have varying mass ratios of its elements.
• The law applies only to gases and not to solids or liquids.
• Elements in a compound can exist in any proportion without restriction.
• A chemical compound always contains its elements in fixed mass ratios.

Tags

NGSS.MS-PS1-1

What should HCl mass be?

H (g) + Cl (g) ---> HCl (g)

0.43g + 0.92g ---> ?

• 1.35 g
• 2.00 g
• 0.75 g
• 1.25 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the mass ratio of CO2 if C has a mass of 11g and O has a mass of 44g?

• 1:4

• 11:44

• 0.25:4

• 11:55

Tags

NGSS.MS-PS1-5

What is at atom composed of?

• Protons, neutrons, and electrons.
• Atoms and molecules.
• Neutrons and quarks.
• Protons and electrons only.

Tags

NGSS.MS-PS1-1

Which part of an atom has a negative charge?

• Protons
• Electrons
• Nuclei
• Neutrons

Which part of an atom has a positive charge?

• Protons
• Nuclei
• Neutrons
• Electrons

What is found in the nucleus of an atom?

• Electrons and positrons
• Quarks and leptons
• Protons and neutrons
• Photons and neutrinos

Tags

NGSS.HS-PS1-8

How many electrons are in the Carbon?

• 12.01

• 12

• 6

• 2

Tags

NGSS.MS-PS1-1