WorksheetsChap 7 Science
Total questions: 40
Worksheet time: 20mins
What is Chemical Bonding?
Combining of atoms to form new substances with new & unique properties to become stable
The rules of chemical bonding are determined by the structure of the atom (mainly the valence electrons)
What are the rules of chemical bonding?
chemical bonding are determined by the structure of the atom (mainly the valence electrons)
Reactivity is determined by the valence electrons ( to become stable an atom needs 0 or 8 valence electrons )
How many valence electrons are required to be stable?
7
0 or 8
5 or 3
Atoms are
NEUTRAL
POSITIVE
NEGATIVE
Ionic bonding involves..
a transfer of electrons
a transfer of protons
a transfer of neutrons
Ionic bonding involves..
a metal and nonmetal
a nonmetal and nonmetal
Ionic bonding takes place between..
a positive ion and negative ion
a positive ion and positive ion
a negative ion and negative ion
a neutral ion and neutral ion
an ionic bond is..
strong
weak
In an ionic bond, 1 atom... and 1 atom ...
loses electrons, gains electrons
gains electrons, gains electrons
Metals are positive
TRUE
FALSE
Nonmetals are negative
TRUE
FALSE (THEY ARE POSITIVE)
Ions are..
Charged particles, positive or negative
Charged ions, negative
Positive ions lose electrons
TRUE
FALSE
Negative ions gain electrons
TRUE
FALSE
Ionic bonds are held together by..
electromagnetic force
magnetic fields
oxygen
In order for an ion to form..
an electron must be neutral
an electron must be added or taken away.
Ionization is the..
process of removing electrons and forming ions
process of removing ions and forming electrons
ionization energy is..
energy required to remove an electron
process of removing electrons and forming ions
Electron Affinity is..
tendency of an atom to attract electrons (gaining electrons)
the arrangement of ions in an ionic compound
A Crystal Lattice is..
the arrangement of ions in an ionic compound
process of removing electrons and forming ions
Crystal Lattices are very stable, and have high melting points.
TRUE
NEGATIVE
A chemical formula for an ionic compound shows a ratio of positive to negative ions
TRUE
FALSE
A crystal lattice arrangement gives the solid a unique shape
FALSE (SPECIFIC SHAPE)
TRUE
A covalent bond is..
Bonding in which electrons are shared
process of removing electrons and forming ions
covalent bonds takes place between..
two nonmetals
two metals
In a covalent bond (CB) the positive nucleus of each attracts the shared electrons at the same time
TRUE
FALSE
A covalent bond uses dot diagrams to show bonding
TRUE
False
CB takes place between atoms of different elements as well as atoms of the same element
TRUE
FALSE
Covalent
nonmetal + nonmetal
electrons are shared
strong
TRUE
FALSE (WEAK)
Diatomic elements are..
2 atoms of different elements
2 atoms of the same element
A molecule is...
combination of atoms formed by CB a molecule is the smallest part of a covalently bonded substance that has all the properties of that substance
metals give up electrons easily
Can Al atoms bond with Al atoms → yes
A chemical formula shows..
shows the exact # of atoms in the bond
the exact number of protons in the bond
ionic bonds are just a ratio
TRUE
FALSE
Polyatomic ions are..
a group of covalently bonded atoms that act as a single unit when bonding
shows the exact # of atoms in the bond
Metals give up electrons easily
TRUE
FALSE
Metallic bonds are..
2 metal atoms of the same element that give up electrons easily, and are generally strong.
2 nm atoms of different atoms, generally weak.
Sea of electrons is accounted for in what bond?
Metallic
Covalent
Why are metals good conductors?
The electrons can move through the metal.
The electrons are in place.
Oxidation numbers is defined as..
shows the exact # of atoms in the bond
positive or negative and tells how many electrons are given away or added to
Metals have low ionization energies because they lose electrons easily.
True
FALSE
