Vocabulary
A pure substance that cannot be separated into simpler substances by chemical or physical means.
What is an element?
How many sig figs are 0.001702?
4
Is Calcium a metal, nonmetal, or transition metal
Metal
HCl
Hydrochloric Acid
Convert 43.1 ˚C to ˚F.
Atoms with the same number of protons but a different number of neutrons are called
Isotopes
12.04- 4.1?
7.9
These elements are shiny, good conductors, and malleable
What are metals?
CH4
Methane
Chemical
What is the difference between weight and mass?
Mass is a measure of the amount of matter in an object. A measure of gravitational force exerted on an object is called ‘weight’
5.98 x 10^-5
How many electrons, protons, and neutrons are in
Fe-56
Electrons: 26
Protons: 26
Neutrons: 30
ClO4 -
Perchlorate
A piece of Pt metal w/ density of 21.5 g/mL has a volume of 4.49 mL. What is the mass?
96.5 g
An electrically charged particle obtained from an atom or molecule by adding or removing e’s
Ions
1000 ug = ..... g
1.0×10−3 g
Elements in Period 17 form what charge ions?
-1
Copper (II) Chlorate
CuCl2
Find the empirical formula for glucose (C6H12O6)
CH2O
What is the difference between Accuracy and Precision?
-Accuracy tells us how close a measurement is to the true value of the quantity that was measured.
-Precision refers to how closely two or more measurements of the same quantity agree with one another.
A rock has a mass of 48 g. When dropped into a graduated cylinder containing water, the water level rises from 25.0 mL to 43.5 mL. What is the density of the rock?
2.59g/mL
Which element in the periodic table has:
Atomic number 15
Is a nonmetal
Belongs to Group 15
Phosphorous
dibromine monoxide
Br2O
Name FeO