Atomic & Periodic
1. The smallest unit of matter that makes up all elements is a(n):
Proton
Atom
Electron
Compound
Atom
24.All the elements in Group 2 have the same
atomic mass
number of valence electrons
chemical symbol
atomic number
number of valence electrons
26. Which of the following is a mixture that looks the same throughout?
Heterogeneous mixture
Homogeneous mixture
Suspension
Colloid
Homogeneous mixture
54. A change in an object’s position over time is called:
Force
Motion
Friction
Inertia
Motion
80. A dog pulls on a rope tied to a tree. Which statement best describes the forces on the rope?
A. The dog pulls with more force than the tree.
B. The tree pulls with more force than the dog.
C. The dog and tree pull with equal forces in opposite directions.
D. The rope has no forces acting on it.
The dog and tree pull with equal forces in opposite directions
2. Which particle has no charge?
Proton
Neutron
Electron
Ion
Neutron
24 How are atoms arranged in the modern periodic table?
by increasing atomic number
27. In a solution, the substance that does the dissolving is called the:
Solute
Solvent
Reactant
Product
Solvent
The force that pulls all objects toward each other is called:
Friction
Gravity
Acceleration
Inertia
Gravity
82. A woman is taking a brisk walk. What information would you need to know in addition to her speed to determine her velocity?
Her mass.
The direction she is walking.
The length of her stride.
The time she has been walking.
the direction she is walking.
3. The number of protons in an atom’s nucleus is called the:
Atomic Mass
Mass Number
Atomic Number
Isotope
Atomic Number
25. When do atoms form a covalent bond?
when they share electrons
when they give up electrons
when they accept additional electrons when electrons remain with the same atoms
. when they share electrons
29. A colloid can be described as:
A mixture where particles settle out quickly
A mixture with large, visible particles
A mixture with particles that scatter light and don’t settle
A chemical compound
A mixture with particles that scatter light and don’t settle
58. Forces that are equal in size and opposite in direction are:
Unbalanced Forces
Balanced Forces
Contact Forces
Noncontact Forces
Balanced Forces
77 Explain what Net Force means.
Net force is the overall force acting on an object after all the individual forces acting on it are added together.
5. A covalent bond is formed when atoms:
Transfer electrons
Share electrons
Gain protons
Lose neutrons
Share electrons
30. An exothermic reaction:
Absorbs heat
Releases heat
Does not involve energy
Always forms a solid
Releases heat
31.Which system allows matter to enter or leave?
Closed system
Open system
Balanced system
Sealed system
Open system
Which type of friction occurs when an object rolls over a surface?
Sliding
Rolling
Fluid
Static
Rolling
76 Define Velocity in your own words
Velocity is the speed of an object in a specific direction
21. Explain the difference between an ionic bond and a covalent bond
An ionic bond forms when electrons are transferred from one atom to another, creating oppositely charged ions that attract each other, while a covalent bond forms when atoms share electrons.
22. Compare the Carbon Family and Oxygen Family in terms of valence electrons?
The Carbon Family (Group 14) has 4 valence electrons, while the Oxygen Family (Group 16) has 6 valence electrons
53 Explain the difference between a physical change and a chemical change.
A physical change alters the form or state of a substance without changing its chemical identity, while a chemical change produces a new substance with different properties.
64. The Law of Universal Gravitation states:
All moving objects create force
The force of gravity acts between all objects that have mass
Gravity only exists on Earth
The speed of gravity depends on force
The force of gravity acts between all objects that have mass
78. Describe what happens to an object when unbalanced forces act on it
When unbalanced forces act on an object, the object’s motion changes—it may start moving, stop, speed up, slow down, or change direction.