Term 2 Review 24-25

The Basics

100

Name the 3 types of materials we would need goggles to work with.

Chemicals, Heat, Glass

200

Which of the following is matter? (can be more than 1)

Heat

Air

Door

Cells

Air

Door

Cells

300

Convert 256 milliliters into liters.

.256 L

400

What is the density of an unknown substance if its volume is 50mL and its mass is 25g?

.5 g/mL

500

Find the volume of 20.0 grams of gold. (Must have correct units)

(Density of gold = 19.3 g/mL)

1.03 mL

Periodic Table

100

How many valence electrons does oxygen have?

6 valence electrons

200

How many shells does silver have?

5 shells

300

Is calcium a metal, nonmetal, or metalloid?

Metal

400

Name one element on the periodic table that is a halogen.

Fluorine, chlorine, bromine, or iodine

500

How many total atoms are in the compound Cu(NO₃)₂?

9

Atomic Chemistry

100

What is the isotope symbol of carbon 14?

14/6 C

200

What element is created when aluminum undergoes beta decay?

silicon

300

How many protons, neutrons, and electrons are in Germanium-72?

32 protons, 40 neutrons, and 32 electrons

400

Which of the 3 main particles in the atom was discovered last?

Neutron

500

What is the daughter isotope when Europium-154 undergoes alpha decay?

Promethium-150

Electron Configuration

100

How many electrons can fit in the 3rd shell?

18

200

How many CORE electrons does sulfur have?

10 core electrons

(16 total - 6 valence)

300

What element has the electron configuration [Ar]4s²3d⁵?

Manganese

400

Draw the shell model for calcium.

n = 1 has 2 electrons

n = 2 has 8 electrons 

n = 3 has 8 electrons

n = 4 has 2 electrons

500

What is the electron configuration of Cerium?

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f²

Ionic Bonding

100

What charge does a sulfur ion have?

-2

200

When ions bond, what is the total charge of the compound?

zero

300

In the compound magnesium iodide, identify the cation.

Mg²⁺

400

Write the name and formula of the compound formed when an aluminum ion and an bromine ion combine.

Aluminum bromide

AlBr₃

500

Write the formula of the compound formed when a sodium ion and a carbonate ion (CO₃^2-) combine.

Na₂CO₃

Why?

100

What is the defining characteristic of an element, that when it is changed, the identity of the element is changed?

protons

200

Why does 4 s subshell get filled before 3d?

It takes less energy to fill 4s since it only need 2 to fill it (3d needs 10)

300

What "need" is being satisfied when atoms bond?

Fill the valence shell with 8 electrons.

400

Why does magnesium lose 2 electrons instead of adding 6 electrons when it becomes an ion?

It requires less energy to get the desired full valence shell.

500

Why are neutrons important in a nucleus?

They create stability by binding with and separating protons that want to repel each other.