WorksheetsDCP #3 Review (21-22)
Total questions: 45
Worksheet time: 34mins
Which statement best where electrons are found?
Electrons are found inside area Z and have no charge
Electrons are found in area X and have no charge
Electrons are found in area X and have a negative charge
Electrons are found in area Z and have a negative charge
Which statement correctly compares the masses of subatomic particles in an atom such as carbon?
An electron has a greater mass than a proton
A proton has about the same mass as an electron
A proton has about the same mass as an neutron
Neutrons, protons, and electrons have the same mass
How many protons does an atom of Rubidium (Rb) have with 48 neutral particles?
48
37
1
5
Students build a model of a lithium atom with different colored marbles. Based on the chart, which marbles should the students place in the nucleus of their lithium atom model?
Blue and green
Blue and red
Green and red
Blue, green and red
Which two elements have the same chemical reactivity as Rubidium (Rb) with 48 neutral particles?
Potassium and Strontium
Calcium and Strontium
Sodium and Potassium
Strontium and Tin
Some students observe four different lab investigations. The students record their observations in a table. Which investigation most likely involved a chemical reaction?
Investigation 1
Investigation 2
Investigation 3
Investigation 4
What is the difference between the number of electrons in an atom of Barium (Ba) and the number of electrons in Phosphorus (P)?
3
41
56
15
Part of the periodic table is shown. In which numbered position would a Period 4 element that is a metal with three valence electrons be located?
Position 13
Position 15
Position 20
Position 31
A scientist performed an investigation involving a reaction that produced Al2(SO4)3. How many sulfur atoms are represented in this formula?
1 atom
3 atoms
7 atoms
9 atoms
A student creates a chart listing some characteristics of four substances. Which substances is most likely a metal element?
Substance 1
Substance 2
Substance 3
Substance 4
Four elements are shown as they appear in the periodic table. Which statements makes an accurate comparison of some of these elements?
An atom of scandium contains two more protons than atom of vanadium
An atom of chromium contains seven more protons than an atom of scandium
An atom of titanium has fewer protons than an atom of vanadium but more protons than an atom of scandium
An atom of chromium contains four more protons than an atom of scandium but only two more protons than an atom of titanium
Which of these formulas contain equal numbers of carbon atoms?
Formulas I and III
Formulas I and II
Formulas II and III
Formulas I, II, and V
Strontium phosphate is a crystalline substance used in medicine and industry. The formula for strontium phosphate is shown below. How many phosphorus atoms are represented in the formula for strontium phosphate?
1
2
3
4
Which of the following does not describe the chemical equation below?
There are a total of 19 atoms on the products side of the equation
There are 12 hydrogen atoms on the reactants side of the equation
There are a total of 30 atoms on each side of the equation
There are a total of 14 oxygen atoms on the reactants side of the equation
What type of particles are typically found in area Z?
Positive and neutral subatomic particles that have different masses
Positive and negative subatomic particles that have about the same mass
Negative and neutral particles that have different masses
Positive and neutral subatomic particles that have about the same mass
What is the mass number of an atom of Rubidium (Rb) have with 48 neutral particles?
48
37
85
74
Identify the element on the periodic table has a mass number of 126 and 53 positively charged particles.
Iodine
Barium
Bromine
Krypton
How many particles are outside the nucleus of an element that has a mass number of 126 and 53 positively charged particles?
126
53
73
35
How many particles are inside the nucleus of an element that has a mass number of 126 and 53 positively charged particles?
126
53
73
35
Which of the following statements best describes the properties of Calcium (Ca) and Bromine (Br) based on their placement of the periodic table?
Calcium is brittle but bromine is malleable
Calcium has a dull luster but bromine is shiny
Calcium conducts electricity but bromine is an insulator
All of the above
Which of the following properties would best help a student classify an unidentified solid as a metal?
Is the material dull?
Is the material an insulator?
Will the material float in water?
Is the material malleable?
Which set of physical properties would best describe Barium (Ba)?
Dull, malleable, insulator
Luster, brittle, good conductor
Luster, malleable, semiconductor
Luster, malleable, good conductor
The diagram shows a model of an atom. The model has four different symbols representing a different role for each particle within the atom. Which particle determines the reactivity of this atom?
A
B
C
D
The balance shows the mass of a solid block. The volume of the solid block was determined to be 4.0 cm3. What is the density of the solid block?
4.0 g/cm3
34.0 g/cm3
8.5 g/cm3
0.1 g/cm3
According to the table, which sample is most likely Tin (7.3 g/cm3)?
Sample 1
Sample 2
Sample 3
Sample 4
Students are conducting a lab investigation in class. Below is a list of observations that they made while following the procedure. Which of the following best classifies the observations that are chemical changes?
Observations 1 and 3
Observations 1, 3 and 4
Observations 2, 4 and 5
Observations 2 and 5
Which pair of chemical formulas shown below contains the same number of nitrogen atoms in each formula?
Ca(NO3)2 and NH4NO2
(NH4)2CO3 and Al(NO3)3
(NH4)2SO4 and Fe(NO3)3
NH4NO3 and NH4OH
Vinegar, also called acetic acid, contains a total number of eight atoms. Vinegar is composed of carbon, hydrogen, and oxygen. Which of the following best describes the chemical formula for vinegar?
C3O5
C8H8O8
CH3COCH3
CH3COOH
Which statement best describes the atoms of an element?
A Sulfur (S) atom contains 14 electrons outside the nucleus and 32 protons outside the nucleus
A Beryllium (Be) atom contains 9 protons inside the nucleus and 4 electrons outside the nucleus
A Magnesium (Mg) atom contains 12 protons and electrons inside the nucleus
A Carbon (C) atom contains 6 protons inside the nucleus and 6 electrons outside the nucleus
How many valence electrons are there in an atom of Fluorine (F)
9
7
17
2
The diagram below shows a rocket just before and after it lifts off. The rocket is powered by a fuel mixture that is contained within the rocket. Which sequence best identifies the energy transfers that take place as the rocket lifts off?
mechanical → light → chemical
chemical → mechanical→ thermal
thermal → chemical → light
chemical → thermal → mechanical
An atom of a certain element has 51 protons, 5 valence electrons and a mass of 121. At room temperature this element is a brittle solid. How many neutrons are in this atom?
51
5
121
70
A student is asked to identify an element that is a shiny, malleable solid. It has 2 valence electrons and 3 energy levels. Which number best indicated where the element is located?
Element 1
Element 2
Element 3
Element 4
Students in a science classroom perform investigations using different solutions.During each investigation two solutions are mixed and the students make observations. Which of the following observations would provide the least evidence that a chemical reaction had occurred after the solutions were mixed?
The solutions changed color and bubbles began to form.
The solutions formed two layers instead of mixing together.
After the solutions combined, a solid substance formed.
The temperature of the combined solutions increased.
Which of the following processes that occurs during the digestion of food would most be considered a chemical change?
The teeth grind food into smaller pieces inside the mouth.
Water is absorbed into the body through the intestines.
Cold food is warmed up as it travels through the stomach.
Starch molecules are broken apart into sugars by enzymes.
Which of the following statements does not correctly describe the atoms in the diagram?
Element 1 and Element 2 are in the same group
Element 2 and Element 5 are in the same period
Element 4 is a nonmetal
Element 1 and element 3 are in the same group
A diagram of a circuit is shown. Which sequence best identifies the energy transfers that take place within the circuit?
mechanical energy → light and sound energy → electrical energy
light and sound energy → electrical energy → chemical energy
chemical energy → light and sound energy → electrical energy
chemical energy → electrical energy → light and sound energy
Students are asked to find the identity of a mystery substance. Using displacement, students found the initial volume to be 150 mL and final volume is 170 mL. The mass of the substance is 210 grams. What is the identity of the substance?
Lead
Silver
Copper
Gold
The chemical properties of elements can be determined using the periodic table. What is the chemical reactivity of Cesium (Cs) and how is it determined?
A highly reactive metal with 1 valence electron
A highly reactive nonmetal with 7 valence electrons
A highly stable nonmetal with 8 valence electrons
A highly reactive nonmetal with 8 valence electrons
The diagram shows the atomic structures of 4 different elements. Which element is the most reactive?
Ne
Cl
Ga
Sn
Which element, based on its placement on the periodic table, would be considered the least reactive?
1
2
3
4
Sodium reacts with chlorine gas to yield sodium chloride. What mass of chlorine gas, to the nearest gram, reacted with sodium?
23
71
94
48
A chemical reaction is shown. What happens to the total mass as the reaction takes place?
The mass increases
The mass decreases
The mass remains constant
The mass first decrease and then increases
Which statement does not correctly describe the elements found in the periodic table?
Element 3 has two more energy levels than element 4
Element 1 has two less valence electrons than element 2
Element 1 has the same number of valence electrons as element 3
Element 2 has five more energy levels than element 4
Which element has many of the same physical and chemical properties as strontium (Sr) but one less energy level?
Calcium (Ca)
Magnesium (Mg)
Rubidium (Rb)
Barium (Ba)
