If a substance has a pH lower than 7 then it is considered a ____________, and contains a large amount of __________ ions.
What is Acid, and hyrdrogen.
100
A substance with a pH of 6 is called.
an Acid.
100
What is the charge of a proton, neutron, electron.
What is positive, neutral, negative.
100
When salt is dissolved in water, water is the.....
a. solvent
b. solution
c. solution
d. solute
a. Solvent
100
When is Mrs. Colombini's Birthday?
What is December 7th
200
Most of the mass of an atom is concentrated in the ___________.
What is the nucleus....
200
The attraction between a hydrogen atom on one substance to a negatively charged particle on another substance....Very weak bond.
What is a hydrogen bond.
200
The space surrounding the nucleus of an atom contains
a. Ions
b. Neutrons
c. electrons
d. protons
d. electrons
200
Elements in a compound, like h2o are always combined in this manner....
What is a fixed ratio
200
How many questions are on the Test?
what is 45 questions.
300
The subatomic particles that make up atoms are protons, neutrons, and___________.
What is an Electron.
300
T/F A substance with equal numbers of H+ ions is a basic Solution.__________________
False, Neutral
300
When Hydrogen and oxygen combine and form water, water is
a. a product
b. both P and R
c. Neither P nor R
d. a reactan
a. product
300
__________is anything that occupies space and has mass.
What is Matter.
300
What is ironic about this biology chapter we are currently studying?
What is "its about Chemistry".
400
What are the main types of chemical bonds.
What is Ionic and covalent bonds.
400
Water's _____________allows it to dissolve compounds such as table salt (NaCl).
What is polarity.
400
A chemical bond formed by the transfer of electrons is a/an ____________________ in a solution.
Ionic bond
400
If an atom is unstable it means that the nuclei will break down over time. These atoms are known as_____________.
What is Radioactive
400
The pH of Priest River High School.
What is 10.
500
Use the terms solvent and solute to describe how to prepare a salt solution.
answers will vary
500
If the pH of stomach acid and of oven cleaner (a base) were measured,
a. Both would be above 7
b. Both would be below 7
c. the pH of stomach acid would be above 7, but the pH of oven cleaner would be below 7.
D. the pH of stomach acid would be below 7, but the pH of oven cleaner would be above 7
What is D.
500
T/F Usually it is the electrons in the lowest energy level of an atom that determine how that atom reacts.