The Basics
Name the 3 types of materials we would need goggles to work with.
Chemicals, Heat, Glass
How many valence electrons does oxygen have?
6 valence electrons
What is the isotope symbol of carbon 14?
14/6 C
How many electrons can fit in the 3rd shell?
18
What charge does a sulfur ion have?
-2
What is the defining characteristic of an element, that when it is changed, the identity of the element is changed?
protons
Which of the following is matter? (can be more than 1)
Heat
Air
Door
Cells
Air
Door
Cells
How many shells does silver have?
5 shells
What element is created when aluminum undergoes beta decay?
silicon
How many CORE electrons does sulfur have?
10 core electrons
(16 total - 6 valence)
When ions bond, what is the total charge of the compound?
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)
Convert 256 milliliters into liters.
.256 L
Is calcium a metal, nonmetal, or metalloid?
Metal
How many protons, neutrons, and electrons are in Germanium-72?
32 protons, 40 neutrons, and 32 electrons
What element has the electron configuration [Ar]4s23d5?
Manganese
In the compound magnesium iodide, identify the cation.
Mg2+
What "need" is being satisfied when atoms bond?
Fill the valence shell with 8 electrons.
What is the density of an unknown substance if its volume is 50mL and its mass is 25g?
.5 g/mL
Name one element on the periodic table that is a halogen.
Fluorine, chlorine, bromine, or iodine
Which of the 3 main particles in the atom was discovered last?
Neutron
Draw the shell model for calcium.
n = 2 has 8 electrons
n = 3 has 8 electrons
n = 4 has 2 electrons
Write the name and formula of the compound formed when an aluminum ion and an bromine ion combine.
Aluminum bromide
AlBr3
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.
Find the volume of 20.0 grams of gold. (Must have correct units)
(Density of gold = 19.3 g/mL)
1.03 mL
How many total atoms are in the compound Cu(NO3)2?
9
What is the daughter isotope when Europium-154 undergoes alpha decay?
Promethium-150
What is the electron configuration of Cerium?
1s22s22p63s23p64s23d104p65s24d105p66s24f2
Write the formula of the compound formed when a sodium ion and a carbonate ion (CO32-) combine.
Na2CO3
Why are neutrons important in a nucleus?
They create stability by binding with and separating protons that want to repel each other.