Intro to Chem
A snack mix is an example of this type of mixture.
hetergeneous mixture
How many protons does Osmium contain?
76 Protons
Draw a diagram showing groups and periods.
Teacher approval
Electrons have what kind of charge?
Negative
What is H2O?
Water
What is the chemical name for the formula Na2S?
Sodium sulfide
This type of mixture looks uniform throughout. Saltwater is a good example.
Homogenous mixture
When an atom loses electrons, the atom is a
It is a Cation
Neon and Argon are examples of
Noble gases
What block does Radon belong to?
p-block
What is the formula for Sulfur hexafluoride?
SF6
What is the name of FeS?
Iron (II) Sulfide
What term refers to anything that occupies space, physical and chemical properties and exists in gas, liquid or solid form
Matter
The most common isotope of Nitrogen is
N-14
The elements can be found on group 17 of the periodic table of the elements.
Halogens
What is the electron configuration for Cl?
1s22s22p63s23p5
What is the formula for hydrosulfuric acid?
H2S
The chemical name for the compound with the formula KNO3
Potassium nitrate
Color, luster, odor are examples of what type of properties?
Physical properties
An atom of an element has 15 protons, 15 electrons and 16 neutrons has an atomic mass of
31 amu
Alkaline Earth metals for ions which what kind of charge?
+2 Charge
How many electrons does a sulfide ion contain?
18 electrons
What is the formula for Calcium phosphate?
Ca3(PO4)2
Name the compound CuSO4
Copper (II) Sulfate
Giving a client a perm would be considered what type of change
What is Chemical
Please show all work: What is the average atomic mass of element X with three isotopes and the following percent abundances and masses:
X-15 (15.165 amu, 78.5%)
X-17 (17.4015 amu, 18.3%)
X-19 (19.012 amu, 3.20%)
ROUND TO THE NEAREST HUNDREDTH
15.6973835 amu --- Should be 15.70 amu
What element is in group 4, period 5?
Zirconium
What is the full electron configuration of Promethium?
1s22s22p6 3s2 3p6 4s2 3d10 5s2 4d10 5p6 6s24f5
What is the total number of atoms used to make 1 formula unit of ammonium dichromate?
(NH4)2Cr2O7 - 19 atoms
Draw the lewis dot structure for Carbon tetrachloride.
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