Chemistry 1
What is a heterogenous mixture.
When two or more atoms are joined together chemically
What is Molecule
What is spectroscopy?
what is the name, Lewis structure, shape and polarity for the molecule CCl4 ?
1. Carbon tetrachloride
2. see teacher's answer
3. tetrahedral
4. non-polar
Which elements have the very similar chemical properties: He, Li, Na, K, Sb, Rb, Cs, Fr, Al
What are Li, Na, K, Rb, Cs, Fr
This type of mixture looks uniform throughout. Saltwater is a good example.
What is a homogenous mixture?
The element Calcium has how many valance electron?
2
Thew3 elements are found in group 8A on the periodic table of the elements.
What are noble gasses?
The atomic mass unit of copper is 63.55 amu, what is the mass in grams? (1 amu = 1.66 x 10-24 g)
What is 1.06 x 1022 g
What is the name of the negative subatomic particle?
What is electron?
What term refers to anything that occupies space, physical and chemical properties and exists in gas, liquid or solid form
What is Matter
All matter exists in three forms solid, liquid and ?
What is gas
The atomic number tells us this.
What is the number of protons?
This is the number of protons, neutrons, and electrons in the following:
209F1-
What is
9 protons
11 neutrons
10 electrons
The chemical formula for the compound potassium oxide?
What is K2O?
Elements represent unique forms of these little thingies. The building blocks of everything!
What are atoms.
A change in which the formula is not altered.
What is Physical Change
Which light has a higher wavelength: Orange light or blue light?
orange light
This is the temperature of 25 oC in oF.
What is 77oF
ice is an example of which state of matter?
What is Solid
A chemist reacts 11.0 grams of carbon with 12.0 grams of oxygen to get 21.0 grams of gas, along with some leftover carbon. In another experiment, she reacts 12.0 grams of carbon with 16.0 grams of oxygen to get 28.0 grams of gas. Are the two gases the same?
Yes, they are the same gas.
What type of change occurs when ice melts to water
What is Physical
an atom of an element has 15 protons, 15 electrons and 16 neutrons has an atomic mass of____?
What is 31
______ this is the mass of a block of gold if the density of gold is 19.32 g/mL, and the volume is 5.00 mL.
What is 96.6 g?
Solve with correct SF.
3.50 + 1002
1005
An electron in a hydrogen atom jumps from the ground state to the n=2 orbit. A second electron in another hydrogen atom jumps from the ground state to the n=4 orbit. which electron absorbed light of higher frequency?
When a substance loses electrons, the substance is
What is positively charged, or cation
the chemical name for the compound with the formula Na2S
What is sodium sulfide
Calculate the energy of light that has a wavelength of 283 nm.
What is 7.02 x 10-19 J?
C3H8 (l) + 5 O2 (g) --> 3 CO2 (g) + 4 H2O