WorksheetsUnit Two-Chemistry of Living Things
Total questions: 39
Worksheet time: 23mins
What is the charge of a neutron?
Positive
Negative
Neutral
A substance composed of only one type of atom is called an ______.
Element
Compound
Mixture
Solution
What is the maximum number of electrons the second energy level can hold?
2
4
6
8
What is the location of protons in an atom?
Electron Shell/Cloud
Nucleus
Outer Shell
Inner Shell
Ionic bonds are held together by oppositely charged ______.
ions
molecules
atoms
Hydrogen atoms are held together by atoms having ______ charges that attract each other.
strong
slight
no
The pH of rainwater is considered acidic if it is lower than ______.
A) 5
B) 6
C) 7
What are the 6 elements important to life?
A) CHONPS
B) CHON
C) CHOPS
D) CHONS
What is the smallest particle of matter that can retain its chemical properties?
Molecule
Atom
Compound
Element
Atoms that have a charge from losing or gaining electrons are known as ________.
Ions
Isotopes
Molecules
Compounds
One or more solutes dissolved in one solvent is called a ________.
Solution
Compound
Molecule
Element
A type of chemical bond where atoms share electrons is called a ________.
A) Ionic Bond
B) Covalent Bond
C) Hydrogen Bond
D) Solution
A(n) (a) is an atom that has the same number of protons and electrons but different numbers of neutrons and therefore have different physical properties.
A(n) (a) bonds is formed by the attraction of oppositely charged ions
The attraction between a slightly positive hydrogen atom in a polar molecule and a slightly negative atom in another molecule is a (a) bond
A(n) (a) is a substance made up of two or more different elements joined by chemical bonds into a molecule.
A(n) (a) is the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms.
True or False: Water is polar covalent molecule
True
False
What makes up the atomic mass of an atom?
protons and electrons
protons
neutrons
protons and neutrons
All compounds are molecules not all molecules are compounds
True
False
What type of bonding does this picture show?
Ionic
Covalent
What type of bonding does this picture show?
Ionic
Covalent
How many Sodium (Na) are in 6Na2Cl?
1
12
6
2
How many atoms of each element are in NaCl?
Na=1, Cl=1
Na=2. Cl=2
Na=1, Cl-2
C12H22O11 has how many carbon atoms?
1
11
12
45
We used baking soda before in a chemical reaction. How many molecules of it are represented here? 3 NaHCO3
1
3
4
What is the coefficient of this equation
3C6H12O6
H
12
6
3
Water is polar. What does that mean?
it is a molecule with opposite charges on opposite ends
it is a molecule with no charge
it is a molecule with identical charges on opposite ends
it is a molecule with too many protons
An acid
is a substance that releases H+ ions when dissolved in water
is a substance that does not release any ions when dissolved in water
is a substance that releases OH- when dissolved in water
releases an equal amount of OH- and H+ ions when dissolved in water
A base is a substance
That releases OH- ions when dissolved in water
That releases H+ ions when dissolved in water
Does not release any ions when dissolved in water
None of the above
What does pH measure?
the amount of hydrogen (H+) ions
the amount of hydroxide (OH-) ions
amount of water
all of the above
If you have a substance with a pH of 6.5 it is a(n).....
Slightly Acidic
Slightly Basic
Strong Base
Strong Acid
