Atoms
What should you do if you narrow it down to 2 multiple choice answers?
Eliminate the others and use evidence to choose/guess your answer between the other 2.
What are the most important steps before the exam to ensure you can focus and do your best?
Get a good night of sleep and nutritious food. Also, being on time so you aren't in a rush.
If you don't know where to start on a question, what's the very first thing you can do?
Read the question and instructions carefully
What kinds of questions should you skip?
frustrating questions you are really struggling with, just make sure you don't leave them empty at the end
Name all 3 subatomic particles
What does an atomic number tell you about atoms of that element?
The number of protons
Ms. Young is 5' 6". Is this a physical or chemical property?
physical!
Which subatomic particles weigh 1 amu?
neutrons and protons
Where are the electrons in an atom?
orbitals/rings/on the outside of the nucleus
What is a vertical column of elements on the periodic table called?
A group or family
A chemical reaction is indicative of a physical or chemical property?
chemical
An atom has 3 protons and 3 neutrons. How much mass?
6 amu
State the neutron to proton ratio in He-4
2:2
What is a horizontal row of elements called on the periodic table?
A period
Identify the positive ion in an HCl solution.
H+
How many amu is one water molecule?
18
An oxygen atom has a -2 charge. What's the proton to electron ratio?
8:10
Bromine and iodine are elements in Group 17. They have the same amount of...
outside/valence electrons
How will the concentration of ions in seawater change if some of the water evaporates?
They will be more concentrated (it will increase)
Atomic mass is determined by the mass of all natural isotopes AND what else?
their abundance