The Atom
The Periodic Table
Physical vs. Chemical
Measurement
Miscellaneous
100
The smallest unit of matter that maintains its chemical identity
What is an atom?
100
Potassium and bromine both belong to this.
What is period 4.
100
A leaf changes color in the fall and therfore, this type of change occurs.
What is a chemical change?
100
A measure of the quantity of matter is known as this.
What is mass?
100
During lab, a quantitative observation entails these.
What are numbers?
200
A substance, made of two or more atomas that are chemically bonded, that can be broken down into simpler, stable substances.
What is a compound?
200
Elements in the same group or column in the periodic table can be expected to have similar ____________.
What is chemical properties (or number of valence electrons)?
200
A glue gun melts a glue stick, and therefore this type of change occurs.
What is a physical change?
200
mL is a unit of this type of measurement.
What is volume?
200
This scientist identified the nucleus of the atom.
Who is Rutherford?
300
An atom is electrically neutral because the number of these two subatomic particles is equal.
What are protons and electrons?
300
The element that has the greatest electronegativity is this element.
What is fluorine?
300
Ethanol is purified through distillation and the ethanol is changed in this manner.
What is physical?
300
The relationship between the mass of a material, its volume, and its density is described by this formula.
What is D = m/v
300
If two covalently bonded atoms are identical, the bond will be this specific type of bond.
What is nonpolar covalent?
400
Experiments with cathode rays led to the discovery of this subatomic particle.
What is the electron?
400
The energy required to remove an electron from an atom is this.
What is ionization energy?
400
Combustion of propane occurs in a closed container. The reaction is exothermic. This is a ___________ change.
What is chemical?
400
The number of significant figures in the measurement 0.000 305 kg is this.
What is 3 significant figures?
400
According to VSEPR theory, an AB2 molecule is this shape.
What is linear?
500
Isotopes are atoms of the same element that have a different number of these.
What is neutrons (or mass numbers or masses)? Neutrons are relatively heavy and affect the overall mass of the atom.
500
Within a group of elements, as the atomic number increases, the atomic radius does this.
What is increases?
500
Sodium hydroxide is dissolved in water to form an aqueous solution of sodium hydroxide. The reaction is exothermic. This is a __________ change.
What is physical?
500
A sample of gold has a mass of 96.5 g and a volume of 5.00 cm3. The density of the gold is this.
What is 19.3 g/cm3?
500
According to VSEPR theory, the structure of the ammona moelcule, NH3, is this.
What is trigonal pyramidal?
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