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Elements And Chemical Bonds (Pt.1)
Test Description: Elements and Chemical Bonds (Pt.1)
Instructions: Answer all questions to get your test result.
1) Elements are organized on the periodic table in horizontal rows, called periods. What can periods tell us about the electron configuration of an atom of a particular element?
A
How many electron shells it has.
B
How many neutrons it has.
C
How many non-valence electrons it has.
D
How many valence electrons it has.
2) Elements are organized on the periodic table in vertical columns, called groups. What can groups tell us about the electron configuration of an atom of a particular element?
A
How many protons it has.
B
How many neutrons it has.
C
How many electron shells it has.
D
How many valence electrons it has.
3) If I wanted to find out which elements on the periodic table have similar chemical properties and characteristics, which of the following would be the best approach?
A
Identify elements in the same group.
B
Identify elements with charges and those that are neutral.
C
Identify elements with the same amount of isotopes.
D
Identify elements in the same period.
4) There are three main regions of elements on the periodic table. Which of the following is NOT one?
A
Nonmetals
B
Metals
C
Polymers
D
Metalloids
5) Except for hydrogen, elements on the left side are metals. Metals are _____________.
A
bad conductors of electricity, but good conductors of thermal energy.
B
good conductors of electricity and thermal energy.
C
good conductors of electricity, but bad conductors of thermal energy.
D
bad conductors of electricity and thermal energy.
6) Nonmetals are on the right side of the table. Nonmetals are _________________.
A
bad conductors of electricity and thermal energy.
B
good conductors of electricity, but bad conductors of thermal energy.
C
bad conductors of electricity, but good conductors of thermal energy.
D
good conductors of electricity and thermal energy.
7) Elements rarely exist in pure form in nature. (True or False)
A
TRUE
B
-
C
FALSE
D
-
8) A __________________________ is a force that holds two or more atoms together in a molecule/compound.
A
gravitational bond
B
chemical bond
C
magnetic bond
D
nuclear reaction
9) How is a compound unique, when compared to a molecule?
A
A compound must include at least two different elements, a molecule can posses only one type of element.
B
A compound can posses only one type of element, a molecule must include at least two different elements.
C
A compound must include both a metal and a nonmetal.
D
None of These
10) A(n) _________________ tells us the number of atoms of each element in a compound.
A
chemical symbol
B
chemical profile
C
atomic formula
D
chemical formula
11) Electrons closest to the nucleus are in the lowest energy level and electrons farthest from the nucleus are in the highest energy level. Valence electrons are always found in the ___________________.
A
None of These
B
nucleus.
C
lowest energy level, closest to the nucleus.
D
highest energy level, furthest from the nucleus.
12) Valence electrons are the only electrons in an atom of an element that participate in chemical bonds. (True or False)
A
-
B
-
C
FALSE
D
TRUE
13) Which of the following types of models includes only valence electrons?
A
Electron Configuration Diagram
B
Ball-and-Stick Model
C
Space-Filling Model
D
Electron Dot Diagram
14) Why are Noble Gases (Group 18 Elements) stable?
A
Their outermost shell is full/complete with 8 valence electrons.
B
They have an equal amount of protons and electrons.
C
Their outermost shell is empty.
D
They are the product of ionic bonding.
15) Sodium (Na) is a Group 1 element, in Period 3. Is Sodium stable?
A
Yes - It has the same amount of protons and electrons
B
Yes - It is a neutral atom
C
No - Sodium (Na) would need to gain 1 valence electron to become stable
D
No - Sodium (Na) would need to lose 1 valence electron to become stable
16) Beryllium is a group 2, period 2 element. How many bonds can this atom form? (Tip: consider its Electron Dot Diagram)
A
8
B
2
C
1
D
4
17) Carbon is a group 14, period 2 element. How many bonds can this atom form? (Tip: consider its Electron Dot Diagram)
A
2
B
1
C
4
D
3
18) Nitrogen is a group 15, period 2 element. How many bonds can this atom form? (Tip: consider its Electron Dot Diagram)
A
3
B
2
C
1
D
4
19) A covalent bond is a chemical bond formed when two atoms ____________ valence electrons to fill their outer shells and become a stable molecule or compound.
A
absorb
B
share one or more pairs of
C
neutralize
D
transfer
20) A covalent bond would involve _________________.
A
1 metal atom and 1 metalloid atom.
B
2 metal atoms
C
1 metal atom and 1 nonmetal atom
D
2 nonmetal atoms
*select an answer for all questions
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