WorksheetsChapter 4 Part 2
Total questions: 34
Worksheet time: 17mins
What is the smallest unit of any elemental substance that maintains the characteristics of that substance?
Molecule
Atom
Cell
Compound
Why can't atoms be seen even through a powerful microscope?
They are too large
They are extremely tiny
They are transparent
They are constantly moving
What are the smaller parts that each atom is composed of?
Molecules
Subatomic particles
Cells
Compounds
What is the electrical charge of a proton?
Negative
Neutral
Positive
No charge
What is the electrical charge of a neutron?
Positive
Negative
Neutral
No charge
Where are protons and neutrons located in an atom?
Electron cloud
Outer shell
Nucleus
Orbitals
What is the electrical charge of an electron?
Positive
Neutral
Negative
Double positive
How do electrons prefer to move?
Individually
In pairs
In groups of three
In a straight line
What is the space occupied by a pair of electrons in an atom called?
Shell
Layer
Orbital
Field
What does an orbital resemble?
A straight line
A spiral
Concentric layers around the nucleus
A random pattern
Which subatomic particle has a positive electrical charge?
Neutrons
Electrons
Protons
None of the above
Where are electrons located in an atom?
Inside the nucleus
Orbitals or shells
Both inside the nucleus and orbitals
None of the above
Which subatomic particle is neutral in charge?
Protons
Neutrons
Electrons
All of the above
Where are protons located in an atom?
Orbitals or shells
Inside the nucleus
Both inside the nucleus and orbitals
None of the above
What type of charge do electrons have?
Positively charged
Negatively charged
No charge
Neutral charge
Where are protons and neutrons located in an atom?
In the electron cloud
In the nucleus
Orbiting the nucleus
In the outer shell
What is an element?
A mixture of different substances
A pure substance that contains only one kind of atom
A compound of multiple atoms
A liquid with various atoms
What is formed when sodium (Na) combines with chloride (Cl)?
Water
Carbon dioxide
table salt
Oxygen
Which compound is formed when hydrogen (H) combines with oxygen (O)?
Table salt
Water
Carbon dioxide
Sodium chloride
Which elements make up water according to its chemical formula?
Sodium and Chlorine
Hydrogen and Oxygen
Carbon and Oxygen
Nitrogen and Hydrogen
What is the force that holds two atoms together?
Neutron bond
Chemical bond
Proton bond
Ionic bond
Which subatomic particle forms the bond between atoms?
Proton
Neutron
Electron
Nucleus
How many electrons can each orbital hold?
One
Two
Three
Four
What is the area of space surrounding the nucleus that has one or more orbitals called?
Core
Layer
Shell
Field
When are atoms most stable?
When the outer shell is full of electrons.
When the outer shell is empty.
When the outer shell has one electron.
When the outer shell has two electrons.
What is an ionic bond?
A bond where electrons are shared between atoms.
A bond where electrons are transferred from one atom to another.
A bond where protons are transferred between atoms.
A bond where neutrons are shared between atoms.
What is a covalent bond?
A bond formed by the transfer of electrons
A bond formed by the sharing of pairs of electrons
A bond formed by the sharing of protons
A bond formed by the transfer of protons
What are valence electrons?
Electrons in the innermost shell
Electrons that are shared or transferred in chemical bonds
Electrons that are not involved in bonding
Electrons that are only found in metals
What are the substances on the left side of a chemical equation called?
Products
Reactants
Compounds
Elements
What does a plus symbol in a chemical equation indicate?
A chemical change
Substances are combined
Substances are separated
A reaction is complete
What does an arrow represent in a chemical equation?
A physical change
A chemical change or reaction
A mixture
A separation
What are the substances on the right side of a chemical equation called?
Reactants
Elements
Products
Compounds
What does the law of conservation of matter state?
Matter can be changed but not created or destroyed.
Matter can be created and destroyed.
Matter cannot be changed.
Matter can only be destroyed.
A substance in which two or more elements have chemically combined is a...
compound
element
solute
mixture
