Group 6A on the Periodic Table is also known as: 1. Noble gases 2.Chalcogens 3.A

Question

Group 6A on the Periodic Table is also known as:

1. Noble gases

2.Chalcogens

3.Alkali metals

4.Alkaline earth metals

5.Halogens

Which of the following statements is false regarding cations?

1.Cations have a positive charge.

2.A loss of electrons results in a cation.

3.Metals typically lose electrons to form cations.

4.Cations are written first in ionic compounds.

5.All of the above statements are true.

What is the oxidation number for the iron atom in the compound, Fe3(PO4)2?

1. +2

2. +6

3. +3

4. -3

5. +4

Which of the following chemical formulas is correctly paired with its name?

1.Cl2O7, heptachlorine dioxide

2.P4O10, tetraphosphorus decoxide

3.N2H4, binitrogen tetrahydride

4.CCl4, monocarbon tetrachloride

5.H2O, hydrogen dioxide

Explanation / Answer

1st question

Groups 6A of the periodic table are the chalcogens.

The non metals oxygen(O).sulfur (S),and selenium(Se)

The metalloid tellurium(Te) and the metal polonium(Po)

The name “Chalcogen” means “ore former”.

2nd question

The loss of electrons gives a positive charge.

The loss of electrons results in cat ions.

Metals form positive ions, or cat ions. According to the octet rule, metals have relatively few electrons in the outermost energy levels, they tend to lose electrons to form compounds with other elements. The loss of electrons gives metals a positive charge.

The ionic compound is named first by its cation and then by it’s anion. The cation has the same name as its element.

K+1 is called potassioum ion, just K is called potassium atom.

So answer is 5. All the above statements are true.

3rd question

PO4 = 3-
x 2 = 6-
implies that Fe x 3 = 6+
each Fe must be 2+

Oxygen will be -2, so PO4 starts out with a -8 from the oxygens. It could easily be either +5 or -3. Is it logical that it would be -3, since then the entire group, PO4 would be a -11 charge as the anion. So if it is +5, then PO4 is -3 as an anion.

4th question

Chemical formula and name

1.Cl2O7, Diclorine heptoxide

2.P4O10, tetraphosphorus decoxide

3.N2H4, hydrazine

4.CCl4, carbon tetracholoride

5.H2O, water

So the correctly paired chemical formula with its name is option 2.

P4O10, tetraphosphorus decoxide

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.