A(n) _______ is a bond that forms when electrons are transferred from one atom to another.
What is an ionic bond
100
Which of the following is a property of metals?
a. low melting point
b. good electrical conductor
c. good thermal insulator
d. cannot bend without breaking
What is b. electrons in a metal can move freely, so most metals are good conductors of electric current
100
The periodic table is arranged in columns and rows. What are the columns and the rows of the periodic table called?
a. periods and energy levels
b. groups and periods
c. atomic numbers and periods
d. groups and atomic numbers
What is b. groups and periods because the vertical columns are called groups, and the horizontal rows are called periods
100
Flourine has 7 valence electrons. What type of bond is likely to form between two atoms of flourine?
Recognize that 2 atoms of flourine will form a covalent bond
100
Draw a Bohr model of aluminum.
(next question 200 refers to this atom aluminum)
Drawing shows 2 electrons on the first energy level, 8 electrons on the second energy level, and 3 electrons on the third energy level or valence shell
200
A(n)_____ is an interaction that holds two atoms together.
What is a chemical bond
200
If element A has an atomic number 9 and a mass number of 19, how many protons does Element A have?
a. 10
b. 20
c. 9
d. 19
What is c. 9 because the atomic number of an element equals the number of protons in an atom of that element
200
How is the current understanding of atomic structure different from both Thomson's model and Rutherford's model?
a. electrons move only in the current model of the atom
b. electrons are fixed only in the current model of the atom
c. electrons travel in orbits only in the current model
d. electrons move within an electron cloud in the model
What is d. electrons move within an electron cloud in the model because the current model of the atom shows electrons within a region around the nucleus called an electron cloud
200
Draw two atoms of flourine showing the bond that forms between them.
Draws two flourine atoms sharing electrons to fill their outermost energy levels
200
Label the valence electrons. How many valence electrons does aluminum have?
What is 3.
300
A(n)______is the smallest particle of an element that has the chemical properties of that element.
What is an atom
300
Draw a diagram of the model of an atomic structure that Bohr proposed. Use the element Carbon to demonstrate the model.
The nucleus should be a circle in the middle. The first electron shell should have 2 electrons and the outer shell should have 4 electrons.
300
List three properties of metals that nonmetals typically do not have.
What is shiny, ductile, good electrical and thermal conductors, malleable
300
How does the number of valence electrons of an atoms help to determine whether an atoms is likely to form bonds.
Expresses that atoms bond to fill their outermost energy levels.
300
Bohr models do not currently show the location of electrons in an atom. Explain why they are still useful to predict bonding of atoms.
Bohr models show the number of electrons that are available for bonding
400
A(n)_____is a bond that forms when atoms share one or more pairs of electrons.
What is a covalent bond
400
In a neutral atom,the number of electrons equals the number of what other part?
a. protons
b. neutrons
c. nuclei
d. energy levels
What is a. protons because the number of electrons equals the number of protons in a neutral atom
400
Describe where metals and nonmetals are found on the periodic table.
Describes metals as being to the left of the zigzag on the periodic table and nonmetals to the right
400
Draw a Bohr model of neon.
Drawing shows 2 electrons on the first energy level and 8 electrons on the second energy level or valence shell
400
What is that mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons.
a. 4
b. 5
c. 9
d. 13
What is b. 5
500
A(n)_____is a negatively-charged subatomic particle.
What is an electron
500
What must happen for an ion to form?
a. an atom must gain or lose an electron
b. an atom must gain or lose a proton
c. an atom must gain or lose a neutron
d. an atom must gain or lose a nucleus
What is a. an atom must gain or lose an electron because an ion is a charged particle that forms when an atoms gains or loses one or more electrons
500
What are elements that have some properties of metals and some properties of nonmetals called?
Metalloids have some properties of both metals and nonmetals
500
Draw a Bohr model of oxygen.
Drawing shows 2 electrons on the first energy level and 6 electrons on the second energy level or valence shell
500
Which group of the periodic table has a complete set of valence electrons?
a. group 1, alkali metals
b. group 4, carbon group
c. group 7, halogens
d. group 8, noble gases