WorksheetsPhysical science unit 3 review
Total questions: 32
Worksheet time: 8hrs 0mins
Which of the following is true of an atom?
The negative electrons are in motion around the positive nucleus to which they are attracted.
The negative neutrons are in motion around the neutral nucleus to which they are attracted.
The neutral electrons are in motion around the positive protons to which they are attracted.
The positive protons are in motion around the negative neutrons to which they are attracted.
Which of the following statements is true with regard to isotopes?
Isotopes of an element have the same number of protons but a different number of electrons.
Isotopes of an element have the same number of electrons but a different number of protons.
Isotopes of an element have the same number of protons but a different number of neutrons.
Isotopes of an element have the same number of neutrons but a different number of protons.
Which of the following refers to a negatively charged particle that lies outside of the nucleus of an atom?
A. neutron
B. electron
C. isotope
D. proton
The nucleus of an atom is surrounded by
A. a neutron cloud.
B. an electron cloud.
C. rings of orbiting protons.
D. rings of orbiting neutrons.
Which element is a noble gas?
A. manganese
B. chlorine
C. antimony
D. krypton
Which of the following elements has the strongest attraction for electrons?
A. oxygen
B. aluminum
C. boron
D. sulfur
An atom can become less reactive by
. gaining or losing electrons from its outermost shell.
gaining protons from its outermost shell.
losing neutrons from its innermost shell.
losing electrons from its nucleus.
What are the horizontal row of blocks in the periodic table?
A. group
B. period
C. family
D. octet
In which section of the Periodic Table are the most active metals located?
A. lower right corner
B. upper right corner
C. lower left corner
D. upper left corner
Which of the following groups of elements do not have a charge and why?
Alkali Metals, because they have one valence electron.
Noble Gases, because they have a full outer shell of electrons.
Halogens, because they have seven valence electrons.
Alkaline Earth Metals, because they have two valence electrons.
What is the product when a reaction takes place between nitrogen and magnesium?
A. Mg2N3
B. Mg3N2
C. Mg3N6
D. N2Mg3
In a chemical equation, what indicates the number of molecules of a given substance?
A. subscript
B. coefficient
C. superscript
D. reaction number
What is the sum of the charges in a compound?
A. 0
B. + 1
C. − 1
D. + 2
What do magnesium and chlorine react to form?
A. MgCl2
B. Mg2Cl
C. MgCl
D. Mg2Cl2
What is the formula for the compound formed when aluminum ions (Al3+) and chloride ions (Cl- ) unite?
A. AlCl
B. Al2Cl
C. AlCl2
D. AlCl3
Which of the following compounds is NOT composed of three atoms?
A. calcium oxide
B. dinitrogen oxide
C. iron disulfide
D. silicone dioxide
If sodium (Na) is combined with Chlorine (Cl), the compound would have which formula?
A. NaCl
B. ClNa
C. Cl2Na
D. Na2Cl4
What type of reaction is displayed below?
2H2 + O2 → 2H2O
A. synthesis
B. decomposition
C. single replacement
D. double replacement
According to the law of conservation of matter, the number of Fe atoms needed to complete the following reaction is:
1
2
3
4
Look at the following chemical equation.
8Ag2S → 10Ag + S8
What is true about this chemical equation?
It is balanced because the products contain the same number of sulfur (S) atoms as the reactants.
It is unbalanced because the products contain fewer silver (Ag) atoms than the reactants.
It is balanced because the mass of the reactants is equal to the mass of the products.
It is unbalanced because the number of reactants is less than the number of products.
The equation shows a chemical reaction.
Mg + __HCl → MgCl2 + H2
What coefficient is needed to balance the equation?
1
2
3
6
Most metals tend to melt at
A. below 0°C.
B. low temperatures.
C. at room temperature.
D. high temperatures.
Which statement best describes the elements located in group 17?
. The elements in group 17 are both halogens and metals.
The elements in group 17 are both noble gases and metals.
The elements in group 17 are both halogens and nonmetals.
The elements in group 17 are both noble gases and nonmetals.
Which of the following statements is true with regard to bonds?
Ionic bonds and covalent bonds have exactly the same properties.
Ionic bonds require positive and negative charges, while covalent bonds require the sharing of electrons.
. Ionic bonds require the sharing of electrons, while covalent bonds do not.
Ionic bonds and covalent bonds both require the transfer of protons and occur primarily between nonmetals.
An ionic bond takes place between
A. two metals.
B. two nonmetals.
C. a metal and a metalloid.
D. a metal and a nonmetal.
Which of the following is true for covalent bonding?
A. electrons are shared
B. oxidation numbers are always negative
C. electrons are transferred
D. particles are always positively charged
Which type of chemical bond requires the transfer of electrons between atoms?
ionic
metallic
covalent
cooperative
Magnesium must bond with two atoms of chlorine to form magnesium chloride because
magnesium can share two electrons when bonding and chlorine can share one.
magnesium can share one electron when bonding and each chlorine can share two.
magnesium has one valence electrons to use in bonding and each chlorine can receive two.
magnesium has two valence electrons to use in bonding and each chlorine can only receive one.
What is the chemical formula for the compound sodium bromide?
NaBr
Na2Br2
NaBr2
Na2Br
In a chemical formula, which of the following indicates how many of each atom or ion is present?
A. atomic number
B. subscript
C. formula mass
D. the charge
Which equation illustrates conservation of mass?
A. H2 + O2 → 2H2O
B. H2 + Cl2 → HCl
C. H2 + O2 → H2O
D. H2 + Cl2 → 2HCl
The equation shows the reaction between ammonia (NH3) and oxygen (O2).
__NH3 + __O2 → __NO + __H2O
In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?
A. 4, 5, 4, 6
B. 5, 4, 5, 4
C. 5, 4, 4, 5
D. 4, 6, 4, 5
