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WorksheetsCh2.1 Basic Chemistry & Water
Total questions: 40
Worksheet time: 20mins
The smallest, stable subunits of matter.
Cells
Atoms
Macromolecules
Carbon
Which of the following is NOT one of the three main parts of an atom?
Proton
Neutron
Electron
Neutrino
Protons have a ____ charge.
Positive
Negative
Neutral
Electrons have a ____ charge
Positive
Negative
Neutral
Neutrons have a _______ charge.
Positive
Negative
Neutral (no charge)
Which part of the atom can be shared between atoms?
Protons
Electrons
Neutrons
The sharing of electrons between two atoms is called a...
Hydrogen bond
Adhesion
Cohesion
Covalent bond
How many electrons are shared in a single covalent bond? How many in a double covalent bond?
1;2
2;4
4;8
The number may vary
If two atoms share electrons and are covalently bonded to one another, they are collectively known as a __________.
Atom
Molecule
Proton
Neutron
Molecules that contain carbon-hydrogen bonds (hydrocarbons) are known as _________ molecules.
Inorganic
Organic
Acids
Bases
Molecules that have ends that are oppositely charged due to the unequal sharing of electrons.
Acids
Bases
Polar molecules
Nonpolar molecules
Water is _____ and oils are _______
Polar; Polar
Nonpolar; Nonpolar
Polar; Nonpolar
Nonpolar; Polar
A mixture of two substances where one dissolves into the other.
Acid
Base
Solution
Covalent Bond
In a solution like a Kool-aid beverage, the water is the ______ and the sugar would be one of the _______ because it dissolves in the water.
Solute; Solvent
Solvent; Solute
Acid; Base
Base; Acid
T/F: You could dissolve a nonpolar substance in a polar solvent.
True
False
An atom that has an unequal amount of protons and electrons, resulting in a charge.
Covalent Bond
Acid
Base
Ion
Which of the following could form a salt?
Na+ H+ Cl- OH-
Na+Cl-
Na+H+
Cl-OH-
A "salt" is a...
Acid
Base
a solid formed by two oppositely charged ions
Solvent
A "electrolyte" is a...
Acid
Base
salt dissolved in solution
Solvent
Which of the following is true of an ion like Na+?
It has more electrons than protons
It has more protons than electrons
It is neutral
An acid releases ____ ions when dissolved in solution.
H+
OH-
A base releases ____ ions when dissolved in solution.
H+
OH-
Acids fall in the ___ range on the pH scale.
1-7
7-14
Bases fall in the ___ range on the pH scale.
1-7
7-14
Water is a neutral substance, meaning that it would have a pH of ___
0
1
7
14
Which substance would be a stronger acid?
pH of 1
pH of 3
pH of 6
Which substance would be a weak base?
pH of 1
pH of 8
pH of 14
Water is ______
Polar
Nonpolar
T/F: Water is the solvent for almost all solutions within a living thing
True
False
Which of the two illustrations would represent cohesion?
Left
Right
Neither
Water has a tendency to stick to other polar molecules. This is called...
Adhesion
Cohesion
Capillarity
Specific Heat
Bodies of water usually exhibit a "surface tension" due to _______ forces of water molecules sticking to one another at the surface.
Adhesive
Cohesive
Acidic
Basic
You heat a metal spoon and it instantly gets hot to the touch. The spoon would have a _______ specific heat capacity.
Low
High
Water has a ______ specific heat capacity.
Low
High
How does sweat cool the body?
The sweat on the surface absorbs heat away from the body
The sweat is salty and the salt reacts with the air to produce cool temperatures
Sweat removes water from inside the body, and the less water the better in terms of temperature.
What is the chemical formula for water?
CO2
C6H12O6
H20
O2
CO2 (Carbon dioxide) is an _______ molecule
organic
inorganic
Water and Oil ______ when put together.
would mix
would not mix
If you add an electron to an atom, it will become...
more negatively charged
more positively charged
H20 is the chemical formula for water. This means that water has __ hydrogen atom(s) and __ oxygen atom(s) that are _______ bonded.
2 hydrogen,
1 oxygen
covalently bonded
1 hydrogen,
2 oxygen
covalently bonded
2 hydrogen,
1 oxygen
ionically bonded
1 hydrogen,
2 oxygen
ionically bonded
