Atoms
The basic unit of all matter
atoms
The area in the center of the atom where the protons and neutrons exist is called the
nucleus
Water requires a lot of energy to change its temperature: this is called its __________ _____________
heat capacity
A substance with a pH of 10 would be considered a(n)
base
Would water freezing be an example of a chemical or physical change?
physical
What two subatomic particles are found in the nucleus of an atom?
protons and neutrons
What would be an atom's atomic number if it has 5 protons, 6 neutrons, and 5 electrons?
5
solute
What is more acidic: stomach acid or bleach?
stomach acid
Isotopes are atoms of the same element with the same number of protons and different number of _________________
neutrons
What would be an atom's mass number if it has 5 protons, 6 neutrons, and 5 electrons?
11
The property of water where water likes to stick to itself
cohesion
What is the pH of water?
7
A substance that speeds up the rate of a chemical reaction is called a(n)
catalyst
Carbon's atomic number is 6. That means it has 6 __________________
protons
What are the 4 macromolecules?
lipids, carbohydrates, nucleic acids, proteins
A mixture in which the substances are evenly spread out is called a(n) ____________________
solution
Which is more acidic: a substance with a pH of 2 or a substance with a pH of 4?
substance with pH of 2
They speed up the reactions in living cells
What do we call a substance formed by the chemical joining of two or more elements?
What type of bond occurs when electrons are shared between two atoms?
covalent
What type of bonds do water molecules possess?
hydrogen bonds
The pH scale measures the amount of ______________ ions in a substance.
Hydrogen
The ends result(s) in a chemical reaction is called the
product(s)