Atoms & Molecules
The two subatomic particles that are found in the nucleus of an atom
What are protons and neutrons
The number of these has to be the same on both sides of a chemical equation.
What are atoms?
Something given to the control group only, that is designed to be similar to what is being tested in the experimental group.
What is a placebo.
The smallest unit of matter.
What is an atom?
Anything with volume and mass.
What is matter?
A subatomic particle with a negative charge
What is an electron?
Heat, light and gas bubbles are signs that this has happened.
What is chemical change?
Two atoms with the same number of protons but a different number of neutrons are called this.
What is a hypothesis?
A measurement of how much mass there is per unit of volume. Often measured in g/mL
What is density?
An atom with the same number of protons and electrons.
A bond formed by shared electrons.
What is a covalent bond?
There are 10 atoms of this element in the product of this equation:
C3H8 + 5O2 --> 3CO2 + 4H2O
What is Oxygen.
Data that is numerical, comes from measurements, and is used for statistical analysis.
What is quantitative data?
A state of matter that can be compressed.
What is gas
Particles with opposite charge do this.
What is attract, or pull towards each other?
A substance formed by two or more atoms covalently bonded together.
What is a molecule?
Chemical reactions are more likely to occur when this is increased because of the added motion of the molecules.
What is temperature?
The variable that is "input" into an experiment; it is the variable that the scientists change between groups.
What is the independent variable?
Found on the periodic table, this number is the sum of the masses of the protons and neutrons in an atom.
What is the atomic mass?
The chart that lists all the elements organized in groups and periods.
What is the periodic table?
Two atoms with the same number of protons but a different number of neutrons are called this.
What are isotopes?
This number would balance this equation:
N2 + 3H2 --> ____ NH3
What is 2?
Variables that might confuse or mess up results if they are not kept the same in both groups.
What are confounding variables?
The state of matter with the least kinetic energy.
What is a solid?
Atoms form ions to make a full one of these.
What is an valence shell?