Question

A student looks up an element on the periodic table. The table says that the atomic number of the element is 12 and the mass number of the element is 40. What information do these two numbers convey about the element?(1 point)
Responses

The element has 40 protons and 12 neutrons
The element has 40 protons and 12 neutrons

The element has 12 protons and 12 neutrons
The element has 12 protons and 12 neutrons

The element has 12 protons and has 28 neutrons
The element has 12 protons and has 28 neutrons

The element has 28 protons and 40 neutrons
The element has 28 protons and 40 neutrons
Question 2
In order for an atom to be considered "neutral", which of the following must be true? (1 point)
Responses

The number of protons and neutrons must be the same
The number of protons and neutrons must be the same

There are more protons than electrons
There are more protons than electrons

The number of protons and electrons must be the same
The number of protons and electrons must be the same

There are more neutrons than protons
There are more neutrons than protons
Question 3
In all elements in a group, the thing that is the same is the: (1 point)
Responses

Number of electrons
Number of electrons

Number of electrons in the valence shell
Number of electrons in the valence shell

Number of neutrons
Number of neutrons

Number of protons
Number of protons
Question 4
Match the following groups with their descriptions(1 point)
Put responses in the correct response input area to answer the question. Select a response, navigate to the desired input area and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Noble Gases
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Alkali Earth Metals
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Alkali Metals
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Halogens
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Question 5
Two of most unique elements on the periodic table are hydrogen and helium. What makes them so unique and removed from the other groups on the periodic table? (1 point)
Responses

Unlike all other elements, hydrogen and helium have very limited properties
Unlike all other elements, hydrogen and helium have very limited properties

Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons

Unlike all other elements, hydrogen and helium are not considered metals
Unlike all other elements, hydrogen and helium are not considered metals

Unlike all other elements, hydrogen and helium are gases
Unlike all other elements, hydrogen and helium are gases
Question 6
The periodic table groups elements into which of the following three categories? (1 point)
Responses

Dense, Expanded, Compressed
Dense, Expanded, Compressed

Heavy, Light, Medium
Heavy, Light, Medium

Metals, Nonmetals, Metalloids
Metals, Nonmetals, Metalloids

Solids, Liquids, Gases
Solids, Liquids, Gases
Question 7
A bond between sodium (Na) and chlorine (Cl) is what type of bond?(1 point)
Responses

ionic
ionic

hydrogen
hydrogen

covalent
covalent

metallic
metallic
Question 8
Which of the following must happen in order for atoms to bond either ionically or covalently with one another? (1 point)
Responses

The ions must have different charges
The ions must have different charges

The chemical properties of the atoms must be satisfied
The chemical properties of the atoms must be satisfied

The resulting compound must follow ionic naming conventions
The resulting compound must follow ionic naming conventions

The valence shells of all atoms must be filled after the bonding occurs

Answer 1

Here are the answers:

1) The element has 12 protons and has 28 neutrons.

2) The number of protons and electrons must be the same.

3) Number of electrons in the valence shell.

4) Matches:
- Noble Gases — unreactive, full valence shell (stable)
- Alkali Earth Metals — Group 2, 2 valence electrons, reactive metals
- Alkali Metals — Group 1, 1 valence electron, very reactive
- Halogens — Group 17, 7 valence electrons, very reactive nonmetals

5) Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons.

6) Metals, Nonmetals, Metalloids.

7) ionic.

8) The valence shells of all atoms must be filled after the bonding occurs.