According to the map, where did de Soto’s exploration of America begin?
(1 point)
Responses
Georgia
Georgia
Florida
Florida
South Carolina
South Carolina
Alabama
Florida
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
C
The main-group elements are the forty-four elements that occupy groups 1A-VIIIA of the periodic table. Main-group elements are important because of their high natural abundance both in the Earth's crust and in the human body and are commercially valuable. Review the families containing main group elements and locate families IVA - VIIA. When forming chemical compounds, these four families have commonalities. Explain using as many answer choices that would apply.
Responses
As nonmetals, they have high electron affinities.
As nonmetals, they have high electron affinities.
They gain or share electrons when they react with other elements.
They gain or share electrons when they react with other elements.
When forming compounds they become positive ions.
When forming compounds they become positive ions.
When forming compounds, they obey the octet rule to have eight outer electrons.
When forming compounds, they obey the octet rule to have eight outer electrons.
These elements form covalent bonds when combining with metals.
The main group elements in families IVA - VIIA have the following commonalities when forming chemical compounds:
- They gain or share electrons when they react with other elements.
- When forming compounds, they obey the octet rule to have eight outer electrons.
- These elements form covalent bonds when combining with metals.
Note: The statement "As nonmetals, they have high electron affinities" is not applicable to all the elements in these families, as there are elements like carbon (C) and silicon (Si) that are classified as nonmetals but do not necessarily have high electron affinities.
Sodium chloride, better known as table salt, is an ionic compound. Which conclusion would best be drawn from this information?
Responses
Sodium chloride is very flexible at room temperature.
Sodium chloride is very flexible at room temperature.
Sodium chloride will not dissolve in water.
Sodium chloride will not dissolve in water.
Sodium chloride has a high melting point.
Sodium chloride has a high melting point.
Sodium chloride is a liquid at room temperature.
Sodium chloride has a high melting point.
You are studying the differences between ionic and covalent compounds. After studying the properties of each type of compound, your teacher has provided this table and asked you to (1) identify the ionic compound(s) and explain your choice(s).
Responses
Compounds A and D because they have relatively high melting points.
Compounds A and D because they have relatively high melting points.
Compound B because it has a very high melting point.
Compound B because it has a very high melting point.
Compounds A, B, and C because they are solid at room temperature.
Compounds A, B, and C because they are solid at room temperature.
Compounds A, B and C because they are soluble in water.
Compounds A, B and C because they are soluble in water.
Compounds A and D because the conduct electricity in aqueous solutions.