Honors Midterm Review

What is the maximum number of electrons in the fourth principal energy level?

• 32

• 8

• 2

• 18

What is the energy required to remove an electron from an atom in the gaseous state called?

• ionization energy

• shielding energy

• nuclear energy

• electronegative energy

How many electrons are found in Mg²⁺?

• 12

• 14

• 10

• 2

Tags

NGSS.HS-PS1-1

The natural distribution of the isotopes of a hypothetical element is 60.795% at a mass of 281.99481 amu, 22.122% at a mass of 283.99570 amu, and the remainder has a mass of 286.99423 amu. Calculate the atomic mass of the element.

• 284.00 amu

• 283.29 amu

• 284.33 amu

• 281.99 amu

• 286.99 amu

Tags

NGSS.HS-PS1-8

The quantity of heat required to change the temperature of 1 g of a substance by 1C is defined as ____.

• a calorie

• density

• joule

• specific heat

Tags

NGSS.HS-PS3-4

Which of the following can be a pure substance?

i. gold

ii. air

iii. homogenized milk

iv. sugar completely dissolved in water

v. ice

• ii and iv

• i and iii

• ii and iii

• i and v

• ii, iii, and iv

The atomic mass of an element is the ____.

• total mass of the isotopes of the element

• total number of subatomic particles in its nucleus

• weighted average of the masses of the isotopes of the element

• average of the mass number and the atomic number for the element

What is the polarity of HCN?

• hydrogen bonding

• polar

• nonpolar

• dipole-dipole

Which of the following is NOT a physical change?

• grating cheese

• mixing two cheeses in a bowl

• fermenting of cheese

• melting cheese

A process that absorbs heat is a(n) ____.

• endothermic process

• polythermic process

• exothermic process

• ectothermic process

Tags

NGSS.HS-PS1-4