Atoms
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...
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