ATI TEAS 7 CHEMISTRY EXAM
QUESTIONS AND ANSWERS
Polar Covalent Bond - Answer-Unequal sharing of electrons. Electronegativity
difference is equal to or more than 0.5.
Nonpolar Covalent Bond - Answer-Equal sharing of electrons. Electronegativity
difference is less than 0.5
Electronegativity - Answer-an atom's ability to attract electrons.
Period number indicates what of energy levels/electron shells? - Answer-Number of
shells or energy levels. 7.
Group number indicates what of energy levels/electron shells? - Answer-Number of
valence electrons. 8.
Isotopes - Answer-Atoms of the same element that have different numbers of neutrons,
thus different mass.
How many electrons fit on the first energy level? - Answer-2 electrons
How many electrons fit on the second energy level? - Answer-8 electrons
How many electrons fit on the third energy level? - Answer-18 electrons
How many electrons fit on the fourth energy level? - Answer-32 electrons
Atomic Radii - Answer-Size of an atom, distance from center of nucleus to the
outermost electron.
What affects the force of attraction between electrons and protons? - Answer-- The
distance of the electron to the proton.
- The amount of protons in the nucleus.
The further away an electron is from the proton... - Answer-the less attraction there is,
and the less hold the proton has on the electron.
The closer an electron is to the proton... - Answer-the more attraction there is, and the
more hold the proton has on the electron.
Compound - Answer-A substance made up of atoms of two or more different elements
joined by chemical bonds.
, Homogenous Mixture - Answer-Composition varies, no distinct boundaries. Ex. Salt and
water.
Heterozygous Mixture - Answer-Distinct boundaries and composition varies. Ex. Oil and
water.
Subatomic Particles - Answer-protons, neutrons, electrons
Molecule - Answer-two or more different or similar atoms held together by covalent
bonds
Atom - Answer-Basic unit of matter; smallest part of an element
Diatomic Element - Answer-element whose atoms can form covalent bonds with
another atom of the same element
Seven Diatomic Elements - Answer-H2, F2, Br2, I2, N2, O2, CI2.
Atomic number - Answer-number of protons. from top left to bottom right in periodic
table. measured in amu.
Groups/families (periodic table) - Answer-vertical columns
Periods (periodic table) - Answer-horizontal rows
Properties of Metal - Answer-Shiny, malleable, ductile, good conductors of heat and
electricity, forms positive ions (cations), high density, high melting and boiling point.
Properties of Nonmetals - Answer-dull, brittle, poor conductors of electricity and heat,
low density, low boiling and melting points, forms both cations and anions.
Properties of Metalloids - Answer-properties of both metals and nonmetals; okay
conductors, can be shiny or dull
Main Group Elements, Group A - Answer-Alkali metals, alkaline earth metals, halogens,
and noble gases
Alkali Metals (group 1) - Answer-highly reactive, form cations with +1 charge.
Alkaline Earth Metals (Group 2) - Answer-less reactive than alkali metals, form cations
with +2 charge.
Halogens (Group 17/3) - Answer-diatomic elements, form anions with -1 charge.
Noble Gases (Group 18) - Answer-non-reactive and most stable (due to outermost
valence shell being completely full of electrons). also known as inert gases.
QUESTIONS AND ANSWERS
Polar Covalent Bond - Answer-Unequal sharing of electrons. Electronegativity
difference is equal to or more than 0.5.
Nonpolar Covalent Bond - Answer-Equal sharing of electrons. Electronegativity
difference is less than 0.5
Electronegativity - Answer-an atom's ability to attract electrons.
Period number indicates what of energy levels/electron shells? - Answer-Number of
shells or energy levels. 7.
Group number indicates what of energy levels/electron shells? - Answer-Number of
valence electrons. 8.
Isotopes - Answer-Atoms of the same element that have different numbers of neutrons,
thus different mass.
How many electrons fit on the first energy level? - Answer-2 electrons
How many electrons fit on the second energy level? - Answer-8 electrons
How many electrons fit on the third energy level? - Answer-18 electrons
How many electrons fit on the fourth energy level? - Answer-32 electrons
Atomic Radii - Answer-Size of an atom, distance from center of nucleus to the
outermost electron.
What affects the force of attraction between electrons and protons? - Answer-- The
distance of the electron to the proton.
- The amount of protons in the nucleus.
The further away an electron is from the proton... - Answer-the less attraction there is,
and the less hold the proton has on the electron.
The closer an electron is to the proton... - Answer-the more attraction there is, and the
more hold the proton has on the electron.
Compound - Answer-A substance made up of atoms of two or more different elements
joined by chemical bonds.
, Homogenous Mixture - Answer-Composition varies, no distinct boundaries. Ex. Salt and
water.
Heterozygous Mixture - Answer-Distinct boundaries and composition varies. Ex. Oil and
water.
Subatomic Particles - Answer-protons, neutrons, electrons
Molecule - Answer-two or more different or similar atoms held together by covalent
bonds
Atom - Answer-Basic unit of matter; smallest part of an element
Diatomic Element - Answer-element whose atoms can form covalent bonds with
another atom of the same element
Seven Diatomic Elements - Answer-H2, F2, Br2, I2, N2, O2, CI2.
Atomic number - Answer-number of protons. from top left to bottom right in periodic
table. measured in amu.
Groups/families (periodic table) - Answer-vertical columns
Periods (periodic table) - Answer-horizontal rows
Properties of Metal - Answer-Shiny, malleable, ductile, good conductors of heat and
electricity, forms positive ions (cations), high density, high melting and boiling point.
Properties of Nonmetals - Answer-dull, brittle, poor conductors of electricity and heat,
low density, low boiling and melting points, forms both cations and anions.
Properties of Metalloids - Answer-properties of both metals and nonmetals; okay
conductors, can be shiny or dull
Main Group Elements, Group A - Answer-Alkali metals, alkaline earth metals, halogens,
and noble gases
Alkali Metals (group 1) - Answer-highly reactive, form cations with +1 charge.
Alkaline Earth Metals (Group 2) - Answer-less reactive than alkali metals, form cations
with +2 charge.
Halogens (Group 17/3) - Answer-diatomic elements, form anions with -1 charge.
Noble Gases (Group 18) - Answer-non-reactive and most stable (due to outermost
valence shell being completely full of electrons). also known as inert gases.
