True or False: The left side of the periodic table are metals and that right side are nonmetals
True
100
The indented side of a spoon is an example of...
A) convex mirror
B) concave mirror
C) convex lens
D) concave lens
B) concave mirror
100
There are 3 protons and 4 neutrons. What is the atomic mass for this element?
3 protons + 4 neutrons = 7 for atomic mass - Lithium
100
The planetary model is also known as the _______ model, but was later proven to be incorrect.
Bohr's model
100
List the 3 subatomic particles and their charge, mass and location.
1. protons, + charge, 1 amu, in nucleus
2. neutrons, 0 charge, 1 amu, in nucleus
3. electrons, - charge, 0 mass, out side of nucleus
200
Where is the "S" and "P" blocks on the periodic table?
The "S" block is the far left, and the "P" block is the far right.
200
When is a real image made?
A real image is made when there is a true focal point.
200
Write the electron configuration for Potassium
1s2, 2s2, 2p6, 3s2, 3p6, 4s1
200
What is the electron cloud?
The electron cloud is where the electrons are in orbit, this is the area of high probability of finding electrons.
200
What is the nuclide symbol for Silicone
28
Si
14
300
Where on the periodic table is the stair step that divides the metals form the non metals, what is the name for the elements that "sit" on the stairs of the stair step?
The stair step begins right under the element of Boron and above the element Aluminum. The elements that "sit" on the stair step are called metalloids.
300
What is an example of a convex mirror that we might see or use every day?
An example of a convex mirror that we might use or see everyday would be a rear view mirror of a car, or the giant mirrors in a grocery story or wear house.
300
The electron configuration for ____ element is:
1s2, 2s2, 2p6, 3s2, 3p6. What is this element?
This is the electron configuration for the element Argon.
300
What keeps/ holds the nucleus of an atom together?
The strong force keeps the nucleus of an atom together.
300
What is an example of a heterogeneous and a homogeneous mixture?
Heterogeneous= oil & water, milk, salad dressing
Homogeneous= sugar in coffee, salt water, any mixture of gas.
400
Group 1 = 1 Valence Electron, how many valence electrons do the rest of the groups G2, G13-G18 have? What is the one exception for G18?
G2= 2, G13=3, G14=4, G15=5, G16=6, G17=7, G18=8.
The one exception for group 18 is Helium.
400
True or False: the image for a concave mirror is appears up side down and backwards, this is also the same for a concave lens.
False, in a concave lens the image appears right side up.
400
After 10 years, 75g of an original sample of 100g of a certain radionuclide has decayed. What is the half-life of the nuclide?
Half life = 5 years
Given: If 1/4th of the orginal amount remains after
100 g-> 75 g 10 years, the half life would then be 5 years
10 years
400
When does an electron "jump" to different energy levles?
When an electron becomes "excited" it will jump up to a higher energy level, but will then jump back down and when that happens it gives off a photon of light.
400
In the Doppler Effect, the ____ shift is moving toward us and the ____ shift is moving away from us.
Blue shift= toward us
Red shift= away from us
500
True or False: The mass labeled on the periodic table is an average, according to the relative abundance of all the isotopes.
True
500
What is the law of refelction?
the law of reflection is the angle that a light ray come in (incidence) is the same angle that it will go out (reflection).
500
If 1 kg of radium (half life= 1600 years) is sealed into a container, how much of it will remain as radium after 1600 years? after 4800 years? If the container is open after a period of time, what gases would you expect to find inside it?
after 1600 years= 1/2 0.5= radon
after 4800 years = 1/8 .125 = helium
1/ 1/2= .5/2 = .25/2 = .125
500
the ___ photon of light would typically be the first engery level jump, where as the ____ would be the last.
Red would be first and purple would be last.
500
How do glow in the dark objects work?
When held up to a light source to "charge" the electrons become "excited" and hop up to a higher energy level, some electrons will become stuck on a higher energy level, but eventually all electrons will come back down to its ground state (very slowly) and will then give off photons of light= the glow.