WorksheetsM18 - Lesson 1 - Stability in Bonding
Total questions: 19
Worksheet time: 10mins
The atom that contains the fewest electrons is __.
oxygen
hydrogen
helium
water
In sodium chloride, which atom loses an electron?
sodium
salt
neither
chloride
A compound __.
is composed of only metals
is a pure element
is a combination of two or more elements
has the same properties as its parts
The chemical formula for sucrose is C12H22O11. How many oxygen atoms are there in each molecule of sucrose.
22
45
12
11
Chemical compounds are __.
always unstable
always stable
more stable than their individual elements
less stable than their individual elements
In general, noble gases react with __.
water
metals
other noble gases
nothing
When an atom’s outer energy levels are not filled completely, the atom __.
can gain, lose, or share electrons
is a noble gas
cannot form a compound
is very stable
NaCl is the chemical formula for what compound?
water
sodium chloride
sodium iodide
chlorine gas
When elements form bonds, it changes their __ properties.
chemical
physical
mass
chemical and physical
Why is potassium iodine added to table salt?
It adds to the flavor of salt
Iodine is an element essential for health
Iodine is in the formula for table salt
Table salt causes high blood pressure
The iodine ion I- (a nonmetal) carries what type of charge?
negative
positive
neutral
both
When a group 7 element reacts with a group 1 element, what is the effect on the group 1 atom?
It shares its electron with the other atom
It forms a double bond
It becomes negatively charged
It becomes positively charged
Which of these elements is most likely to form an ionic bond with potassium?
phosphorus
sulfur
chlorine
argon
How many electrons are required to complete the outer energy level of a phosphorous atom?
4
3
2
1
When atoms gain or lose electrons, the charged particles that result are called ____.
ions
allotropes
isotopes
metallic bonds
The properties of a compound are ____ the properties of the elements making up the compound.
different from
the same as
similar
identical
Atoms combine when the compound is ___ than the separate atoms.
less stable
more stable
less reactive
more reactive
What shows the chemical symbol for an elements surrounded by dots representing the electrons in the outer energy level?
A compound formula
A chemical formula
An electron dot diagram
A chemical bond
Francium, which is in the same chemical family as sodium, will carry what type of charge?
negative
neutral
negative and positive
positive
