Font size
Worksheets6th Grade Science 1st 6-Weeks 2021-2022 Test #3
Total questions: 19
Worksheet time: 19mins
8.5C Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, a nonmetal, or a metalloid. Which table was completed correctly?
8.5A Which statement accurately describes the atoms of a specific element?
An indium‚ In‚ atom contains 115 protons inside the nucleus and 49 neutrons
outside the nucleus.
A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons
inside the nucleus.
An aluminum‚ Al‚ atom contains 27 electrons and 27 protons inside the nucleus.
A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside
the nucleus.
8.5B Which element has atoms that contain 50 protons in their nuclei?
Strontium
Tin
Titanium
Vanadium
8.5A What is the total number of protons, neutrons, and electrons in a cadmium, Cd, atom that has a mass number of 112?
(a)
6.6A A certain element exists at room temperature as a dense solid with high luster. when tested, it conducts both heat and electricity well. This element is most likely classified as -
a metalloid.
a nonmetal.
a metal.
an ion.
8.5C The elements in which section of the periodic table are the most stable and rarely react with other elements?
Metals
Metalloids
Noble Gases
Nonmetals
8.5D The table lists some compounds found in foods and their formulas. Based on this information, which of these statements is NOT true?
A molecule of sorbitol contains three more oxygen atoms than a molecule of
glutamine does.
A molecule of lactose contains twice as many atoms as a molecule of fructose
does.
A molecule of fructose contains four more atoms than a molecule of glutamine
does.
A molecule of lactose contains twice as many carbon atoms as a molecule of
sorbitol does.
A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a
black substance that makes up the tarnish on the surface of silver objects. To
remove the tarnish from the ring, students placed it in a pan lined with aluminum foil
and added hot water. Baking soda was added to the hot water and stirred. Students made observations about the process. Which observation of this process provides evidence of a chemical reaction?
Hot water heated the aluminum foil.
The liquid solution changed color.
The pan was lined with aluminum foil.
The hot water cooled.
8.5D Which chemical reaction involves the fewest oxygen atoms?
F
G
H
J
8.5B Reactivity is defined as the capacity of a unit of matter, such as an atom, to undergo a chemical reaction with another unit of matter. An atom's reactivity is determined by the number of-
protons and neutrons in its nucleus.
electrons in its outer shell.
protons in its outer shell.
electrons and protons in its nucleus.
8.5A A chemist made the table below to record some atomic properties of four elements. Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?
Based on the information in the table, which conclusion about the chemical reactivity
of these elements is valid?
Fluorine is the most reactive because it has 7 electrons in the outer shell.
Silicon is the most reactive because it has an equal number of protons and
neutrons.
Silicon is the most reactive because it has an equal number of protons and
neutrons.
8.5C Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?
Fluorine, F, and chlorine, Cl
Boron, B, and aluminum, Al
Hydrogen, H, and cesium, Cs
Cobalt, Co, and nickel, Ni
8.5C One of the properties that makes copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity?
Gold, Au
Radon, Rn
Bromine, Br
Nitrogen, N
6.6A Which statements correctly compare metals and nonmetals?
Metals tend to be good conductors of thermal energy. Nonmetals tend to be good insulators of thermal energy.
Metals are dull and brittle. Nonmetals are shiny and malleable.
Metals are good insulators of electricity. Nonmetals tend to be good conductors of electricity.
Metals cannot be stretched into thin wires. Nonmetals can be stretched into thin wires.
8.5C Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?
Fluorine, F, and chlorine, Cl
Boron, B, and aluminum, Al
Hydrogen, H, and cesium, Cs
Cobalt, Co, and nickel, Ni
8.5C One of the properties that makes copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity?
Gold, Au
Radon, Rn
Bromine, Br
Nitrogen, N
6.6A Which statements correctly compare metals and nonmetals?
Metals tend to be good conductors of thermal energy. Nonmetals tend to be good insulators of thermal energy.
Metals are dull and brittle. Nonmetals are shiny and malleable.
Metals are good insulators of electricity. Nonmetals tend to be good conductors of electricity.
Metals cannot be stretched into thin wires. Nonmetals can be stretched into thin wires.
8.5A How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
(a)
8.5E Students mixed two liquids in a beaker and listed their observations. Based on these observations, which statement contains the best evidence that a chemical reaction occurred?
There is a change in shape.
There is a change in volume.
The two liquids mix into a solution.
The two liquids form a new substance.
