Matter
A type of matter formed by chemically joining two or more elements is known as a
compound
The chemical bond formed when two atoms share electrons is called a(n)
covalent bonds
Label each of the following as a physical change (P) or a chemical change (C). Burning popcorn , Rusting of a fishing pole
Burning popcorn Chemical
Rusting of a fishing pole Chemical
Hydrogen is in group 1 with lithium, sodium, potassium, rubidium, cesium, and francium because it
Has 1 valence electron
Which particles determine the atomic number of an element?
protons
A piece of wood that measures 3 cm by 6 cm by 4 cm has a mass of 80 g.
1.11 g/cm cubed
Which pair of atoms will combine with each other and form an ionic bond?
A. C and O B. C and H
C. Ca and Mg D. Ca and Br
A substance that is an ingredient in a chemical reaction is called a(n) .
reactant
Which statement about the arrangement of the periodic table is not true?
Rare earth elements are in the first column on the left
Three examples of physical changes are
boiling of water, blowing up a balloon, and melting a candle
When two or more substances are physically combined, the result is a(n) .
mixture
How does an atom of aluminum become an ion?
It loses 3 electrons
The Law of Conservation of Mass states
Mass is not lost or created during a chemical change
What is an atom’s nucleus made of?
protons and neutrons
The formula for finding density?
Density = mass/volume
A graduated cylinder has 33.5 mL of water. A piece of metal is added to the water and the new volume is now 46.2 mL. If the metal has a mass of 16.25 g, what is its density?
1.28 g/cm cubed
Name the following compounds:
NBr3
NaC2H3O2
Nitrogen Bromide
Sodium acetate
A solid produced from two liquids in a double displacement chemical reaction is called a
precipitate
Which part of the periodic table indicates the number of energy levels in the electron cloud?
Period
What three things can an element do in order to become stable?
1. sharing electrons
2. accepting electrons from another atom
3. donating electrons to another atom
The color of ink is a .
physical change
Write the chemical formula for the following compounds
Lithium phosphate
Sulfur dioxide
Li3PO4
SO₂
An increase in temperature generally increases the rate of the reaction because
Atoms of the same element that have different numbers of neutrons are called?
isotopes
What is Ms. Howell's favorite candy?
Zots