Summer Packet Quizizz

Which of the following subatomic particles has the least mass?

• proton

• neutron

• electron

• alpha particle

• nucleus

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

• 12.0, Carbon

• 12.011, Carbon

• 10.81, Boron

• 15.99, Oxygen

Which of the following has the same number of significant figures as the number 2.00450?

• 12.345

• 0.6789

• 3.14159

• 7.890

• 123.456

• atomic numbers, mass numbers

• mass numbers, atomic numbers

• charges, atomic masses

• atomic masses, charges

• mass numbers, charges

• phosphorus pentachloride

• phosphorus perchlorate

• phosphorus chloride

• phosphorus chlorate

• phosphorus tetrachloride

Which one of the following molecular formulas is also an empirical formula?

• C₂H₆SO

• H₂O₂

• H₂P₄O₆

• C₂H₆SO

Which pair of substances could be used to illustrate the law of multiple proportions?

• NaCl, KCl

• CH4, C6H12O6

• SO2, H2SO4

• H2O, O2

• CO, CO2

All atoms of a given element have the same number of protons.

• True

• False

Which one of the following is an intensive property?

• amount

• temperature

• length

• volume

• mass

Vertical columns of the periodic table are known as ________.

• groups

• metals

• periods

• metalloids

• nonmetals