WorksheetsScience Review Unit 1
Total questions: 20
Worksheet time: 24mins
If an atom has 12 protons, 13 neutrons, and 12 electrons, what is the charge of the atom?
+1
0
-1
+2
Which statement best describes the nucleus of an atom?
It is a centrally located structure comprosing almost all of the atomic mass and having an overall neutral charge.
It is a centrally located structure comprisng almost none of the atomic mass and having an overall positive charge.
It is located in the electron cloud, comprises almost all of the atomic mass, and has a positive charge.
It is a centrally located structure comprising almost of the atomic mass and having an overall positive charge.
Which model below is the best representation of the atomic structure of a lithium atom?
An element has 27 protons, 27 electrons, and 32 neutrons. Calculate the atomic mass of this element.
52
59
54
51
A group of students examines Bohr structure diagrams of various atoms and a Periodic Table. Which hypothesis can be formulated based on observations of the Bohr models and the Periodic Table?
Elements within the same period on the Period Table have similar properties.
The atomic mass of an atom is determined by the number of protons and neutrons.
The valance number of an atom determines the density of the atom.
The atomic number of an atom is determined by the number of neutrons.
Groups of students built models of atoms using macaroni to represent protons, beans to represent neutrons, and marshmallows to represent electrons. Which improvement would more accurately portray the actual size of each suatomic particle.
Use three different colors of marshmallows to represent the subatomic particles in the model.
Use only lima beans, draw a plus sign on the lima beans that represent protons, a 0 on the lima beans that represent neutrons, and a negative sign on the lima beans that represent the electrons
Use rice grains to represent electrons in the model
Use cotton balls to represent electrons in the model
An electron is approximately 0.05% of the mass of a proton. Protons and neutrons each have a mass of 1 amu. Which of the following best describes the relationship between mass and subatomic particles?
The mass of an electron is equal to that of a neutron.
Atomic mass is the total number of protons and electrons.
A neutron has 0.05% more mass than an electron.
The nucleus comprises over 99% of the atom's mass.
A student is given a diagram of an atom with 3 protons and 3 electrons. Which statement describes the atom if another electron is added to the diagram?
The atomic number will increase by 1.
The atomic mass will increase by 1.
The atomic number will decrease by 1.
The atomic number will stay the same and the atom will become negatively charged.
Which subatomic particles make up the mass of an atom?
1 only
1 and 3 only
3 only
2 and 3 only
Which subatomic particle is attracted to the nucleus?
proton
neutron
electron
none of the above
How can a student use the diagram to calculate the atomic mass for the helium atom?
Add G and K to determine the atomic mass for helium
Subtract L from G to determine the atomic mass for helium
Add G and H to determine the atomic mass for helium
Add G and L to determine the atomic mass for helium
In a neutral calcium atom, there are 20 protons, 20 neutrons, and 20 electrons. If a calcuim atom loses 2 electrons, what will be the calcuim atom's charge?
-2
2
+4
+2
Based on the model, students can conclude all the following valid claims EXCEPT-
each neutron is electrically neutral
the nucleus carries a positive electrical charge
electrons are continuously orbiting the nucleus
electrons are negatively charged particles
A student wanted to make a model of an atom using different colored beads to represent the subatomic particles. The student wanted to represent the differences between the sizes of the subatomic particles and the sizes of the beads used. What would be the most appropiate science tool to use to measure the length and width of the beads?
Microscope
Metric ruler
Anemometer
Triple beam balance
Based on the element card, which data set would best complete the table?
A teacher wants her students to learn about atoms. Which of the following would be an advantage of constructing a model of an atom?
Demonstrate to students that atoms are two-dimensional
Give students an idea of the shape and scale of an atom
Remind students that protons and neutrons are less massive than electrons
Show students that electrons follow simple, circular paths
Which trend could be predicted from the information in the table?
An atom with a smaller number of protons and electrons will have an overall neutral charge.
The overall charge of an atom will be positive and is determined by the number of protons.
The overall charge of an atom will be negative and is determined by the number of electrons.
The overall charge of an atom will be neutral and is determined by the number of protons.
Which section of the Venn diagram represents the contents of the nucleus?
IV
V
VII
VI
Which of the following elements in the table has the largest number of neutrons?
Neon
Boron
Calcium
Lithium
How did Schrodinger change the model of the atom after developing his mathematical equation?
Protons and neutrons orbit the nucleus.
Electrons spin in any direction.
The nucleus orbits the electrons.
Electrons occupy an electron cloud that surrounds the nucleus.
