Atom A has an atomic number of 19 and mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of these is an accurate statement?
Responses
Atom A has an extra nucleon compared to Atom B.
Atom A has an extra nucleon compared to Atom B.
Atom A has more protons than Atom B.
Atom A has more protons than Atom B.
Atom A has one more proton and one more electron than Atom B.
Atom A has one more proton and one more electron than Atom B.
Atom A has one less proton and one more neutron than Atom B.
Atom A has one less proton and one more neutron than Atom B.
Elaborate what knowing that carbon-14 has an atomic number of 6 tells us about the atom.
Responses
Carbon-14 contains 7 electrons, 7 protons, and 7 quarks.
Carbon-14 contains 7 electrons, 7 protons, and 7 quarks.
Carbon-14 contains 6 electrons, 6 protons, and 8 neutrons.
Carbon-14 contains 6 electrons, 6 protons, and 8 neutrons.
Carbon-14 contains 6 baryons, 7 prions, and 8 neutrons.
Carbon-14 contains 6 baryons, 7 prions, and 8 neutrons.
Carbon-14 contains 8 electrons, 6 photons, and 6 neutrons.
Carbon-14 contains 6 electrons, 6 protons, and 8 neutrons.
Using the periodic table, explain the difference between hydrogen, deuterium, and tritium - i.e. hydrogen-1, hydrogen-2, and hydrogen-3
Responses
Allotropes vary in their number of protons - so they contain 1, 2, and 3 protons, respectively.
Allotropes vary in their number of protons - so they contain 1, 2, and 3 protons, respectively.
Isotopes differ only in their number of neutrons - so they contain 0, 1, and 2 neutrons, respectively.
Isotopes differ only in their number of neutrons - so they contain 0, 1, and 2 neutrons, respectively.
These configurations diverge in their number of electrons - so they contain 1, 2, and 3 electrons, respectively.
These configurations diverge in their number of electrons - so they contain 1, 2, and 3 electrons, respectively.
The atoms deviate in their number of protons - so they contain 1, 2, and 3 protons, respectively.
The atoms deviate in their number of protons - so they contain 1, 2, and 3 protons, respectively.
Isotopes differ only in their number of neutrons - so they contain 0, 1, and 2 neutrons, respectively.
The atomic number is considered a unique atom and element identifier. Describe the associated subatomic particle, and how it can be used to identify the atom.
Responses
The number of electrons changes in a unique way as the charge on the atom changes.
The number of electrons changes in a unique way as the charge on the atom changes.
All isotopes of the an element have the same number of neutrons allowing it to describe the unique atom.
All isotopes of the an element have the same number of neutrons allowing it to describe the unique atom.
As the atom absorbs photons the way the photons interact in the nucleus gives the atomic number.
As the atom absorbs photons the way the photons interact in the nucleus gives the atomic number.
The proton number remains constant through changing the atomic charge, energy, and isotopes.
The proton number remains constant through changing the atomic charge, energy, and isotopes.
Identify the number of neutrons in one atom of sulfur with an atomic mass number of 34 amu.
Responses
32
32
34
34
18
18
16
The number of neutrons in one atom of sulfur with an atomic mass number of 34 amu is 18.
The element magnesium has 2 valence electrons. What is the most likely charge on a magnesium ion?
Responses
2+
2+
6-
6-
2-
2-
6+
The most likely charge on a magnesium ion is 2+.
Students conducted experiments to collect data on 4 unknown elements. Using the data table below with the information on each unknown element, which element is LEAST likely to be metallic?
Responses
A
A
B
B
C
C
D
D
Elaborate on what can be learned about the properties by the location of element on the periodic table. Use atomic number 13 as an example.
Responses
It is a transition metal, has 1 valence electrons, becomes a cation with a +1 charge, and is ductile, malleable, and conductive.
It is a transition metal, has 1 valence electrons, becomes a cation with a +1 charge, and is ductile, malleable, and conductive.
It is a main group metal, has 3 valence electrons, becomes a cation with a +3 charge, and is ductile, malleable, and conductive.
It is a main group metal, has 3 valence electrons, becomes a cation with a +3 charge, and is ductile, malleable, and conductive.
It is a non-metal, has 3 valence electrons, becomes a cation with a -3 charge, and is brittle, moldable, and non-conductive.
It is a non-metal, has 3 valence electrons, becomes a cation with a -3 charge, and is brittle, moldable, and non-conductive.
It is a metalloid, has 3 valence electrons, becomes a cation with a -5 charge, and is workable, inelastic, and non-conductive.
It is a main group metal, has 3 valence electrons, becomes a cation with a +3 charge, and is ductile, malleable, and conductive.
What can you conclude about the classification of silicon?
Responses
Silicon is a metal and is shiny, malleable, ductile, conducts heat and electricity, forms basic oxides, and forms cations in aqueous solution.
Silicon is a metal and is shiny, malleable, ductile, conducts heat and electricity, forms basic oxides, and forms cations in aqueous solution.
Silicon is a metalloid and has properties of both metals and nonmetals - it appears lustrous, but is brittle and a poor conductor of heat and electricity.
Silicon is a metalloid and has properties of both metals and nonmetals - it appears lustrous, but is brittle and a poor conductor of heat and electricity.
Silicon is a noble gas and has a full valence electron shell, is chemically non-reactive, colorless, odorless, and is a gas at room temperature.
Silicon is a noble gas and has a full valence electron shell, is chemically non-reactive, colorless, odorless, and is a gas at room temperature.
Silicon is a nonmetal and is dull, brittle, poor conductor of heat and electricity, forms acidic oxides, and forms anions in aqueous solution