Science Chapter 4 Test
noble gas
Atoms lose, gain, or share electrons and become chemically stable as ___________.
lose electrons
Is it easier to lose or gain electrons?
Look in your notes for examples of polar and nonpolar.
Look in your notes for examples of polar and nonpolar.
Atoms
Molecules are made up of _____
Covalent bonds
N2(again small 2) this has the strongest what?
13
This diagram of Boron has 3 electrons that means Boron is in Group what?
Ionic bond
This type of bonding loses or gains electrons and a metal and a nonmetal bond to form it. What is it?
1. Covalent bonding 2. Ionic bonding 3. Metallic bonding
What are the three types of bonding?
electron dot diagram
a model that represents valence electrons in an atom as dots around the elements chemical symbol
polar molecule
a molecule that has a partial positive side and a partial negative
valence electrons
the outermost electrons are called what?
Covalent bonding
Carbon and Oxygen bonding is what kind of bonding?
1st-2 e- 2nd-8e- 3rd-18e- 4th-32e- 5th-50e-
How many electrons can the 1st-5th levels have on a Boer model?
4
How many valence electrons does an atom of carbon have?
ionic bond
If an electron transfers one atom to another atom, what type of bond will most likely form?
pooled metals with metals
In metallic bonding, electrons are ______ and what bonds with what?
conductive
In metallic bonding, you get pure metals. These metals are highly _______which means it makes electricity happen.
sea
In metallic bonds they do not attack but form a ______ around the atom.
Full outermost energy level
Stable elements have to have a _______________________________________ to be called stable.
stable
The atoms of noble gases do NOT bond easily with other atoms because their valence electrons are
Stronger
The more valance electrons two atoms share the ______ the bond between those two atoms
bonds
Valence electrons determine an atoms maxium number of ___
Compound
Which of the following is a pure substance that contains two or more elements?
Atomic number
You figure out how many electrons to put on a boer model by looking at the elements what?
Valance
________ electrons are the only electrons that participate in chemical bonding. They also have the most energy of the electrons in the atom.
metallic bond
a bond formed when many metal atoms share their pooled valence electrons.
valence electron
an outermost electron of an atom that participates in chemical bonding.
conduct
to serve as a medium through which something can flow
covalent bond
A chemical bond formed when two atoms share one or more pairs of valence electrons.
molecule
A group of atoms that are holded together by covalent bonding and acts as an independent unit.
chemical formula
A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
polar molecule
A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons.
ion
An atom that is no longer electrically neutral because it has lost or gained valence electrons.
Ionic Bond
An atom with 2 valence electrons and an atom with 6 valence electrons are likely to form a what?
Valence electrons
Covalent bonds typically form between the atoms of elements that share what?
Least Greatest
Electrons closest to the nucleus have the ____amount of energy and electrons farther from the nucleus have the ___ amount of energy.
gain or lose
In ionic bonding 1 electron will ___ an electron and another electron will _____ another electron
lose(positive ion) gain(negative ion)
In ionic bonding the metal will ____ the electron and the nonmetal will _____ the electron.
Make sure to look at examples for how to do ionic, metallic, and covalent bonding.
Make sure to look at examples for how to do ionic, metallic, and covalent bonding.
covalent
Some compounds are made of _____ molecules
ions
Some compounds are made up of ____
Group 16
The element selenium is a nonmetal. It is an unstable atom that can form two bonds with other atoms. What group is it in?
determined
The exact position of electrons in an atom can not be _____.
4 bonds
The image shows an electron dot diagram for silicon. How many total bond can one atoms of this metalloid make with other atoms?
Bonds an atom can form
The number of unpaired dots on an electron dot diagram is often the number of _______________________________.
8 electrons
The outermost energy level has to have ____ electrons in order to be stable.
Gilbert Lewis
The scientist that developed the electron dot diagram
Covalent bonding
What bonding shares electrons and non-metals are bonded together?
water molecules
What contains polar bonds?
Both types of bonds involve valence electrons
What do ionic bonds and covalent bonds have in common?
electron dot diagram
What does the method of representing atoms and the electrons in their outer energy levels?
Non-metals
What has the properties of poor conductors?
The chemical makeup of a compound
What info does a chemical formula provide?
They conduct electricity poorly.
What is a characteristic of most non-polar compounds?
Covalent bond
What is formed between atoms when they share electrons?
nonpolar
What is it called when electrons are shared equally?
pooled valence electrons
What is shared in a metallic bond?
Metals, metalloids, and nonmetals
What is the location of metalloids metals and nonmetals on the periodic table left to right?
Chemical bonds
What joins atoms together?
Metal and nonmetals
What type of element pairs can form ionic bonds?
gaining one electron
What would make bromine a group 17 element more similar to a noble gas?
Metallic bond freeley
When a metal is bonded with another metal? There electrons are pooled and they flow _______.
polar
When electrons are shared unevenly is called ______.
Metals and non-metals electrons
When elements gain or lose electrons what bond and metals lose what?
positive ion
When metals lose electrons, it can form a _______ ________.
negative ions
When non-metals gain electrons, it can form what?
Carbon
Which atom can form four bonds?
ionic
Which compound is formed by the attraction between negatively and positively charged ions?
group 17
Which group of elements on the periodic table forms a covalent compound with other nonmetals? Group 1, 2,17, or 18.
# of valance electrons in each atom
Which information does the chemical formula CO2 (should be a little 2) not give you?
ion
Which of the following is an atom that has gained or lost an electron and is no longer neutral?
C. sodium and chlorine
Which two elements are likely to form a compound that has ionic bonds? A. carbon and oxygen B.nitrogen and oxygen C. sodium and chlorine D. sulfur and hydrogen
a positive metal ion and a negative nonmetal ion
Which would most likely be joined by an ionic bond?
chemical bond
a force that holds two or more atoms together
chemical bond
a force that holds two or more atoms together.
ion
an atom that has lost or gained valence electrons
ionic bond
an atom that has lost or gained valence electrons
bond
force that holds atoms together in a compound
Compound
material that is made up of two or more different kinds of atoms jointed by chemical bonds
ionic bond
the attraction between positively and negatively charged ions in an ionic compound
