Question 1

Which of the following are considered toxic heavy metals? Outcome # 5) DOK 2)&#10;A) lead, cadmium, and mercury&#10;B) lead, iron, and mercury&#10;C) arsenic, mercury, and calcium

Accepted Answer

Lead, cadmium, and mercury are recognized as toxic heavy metals due to their harmful effects on health and the environment.

Question 2

What is one of the primary components in our atmosphere that leads to acidic rain? Outcome # 5) DOK 1) A) SO B) SO₂ C) both SO and SO₂

Accepted Answer

SO<sub>2</sub>

Question 3

Which of the following gases are considered inert? Outcome # 5) DOK 1) Paired item 1)&#10;A) oxygen&#10;B) hydrogen&#10;C) nitrogen

Accepted Answer

Nitrogen is considered an inert gas in many applications due to its non-reactive nature under standard conditions. It makes up about 78% of the Earth's atmosphere and is used to create inert atmospheres for processes like welding and food packaging, where oxidation needs to be minimized. Oxygen and hydrogen are both highly reactive gases.

Question 4

Which diatomic element is considered an inert gas? Outcome # 9) DOK 1) A) H₂ B) N₂ C) F₂

Accepted Answer

Nitrogen (N2) is not considered an inert gas; it is a diatomic molecule that makes up about 78% of the Earth's atmosphere. The term "inert gas" is typically used to describe noble gases, which do not readily react with other elements. Nitrogen, while relatively unreactive, does not belong to the noble gas group.

Question 5

Which one of the following elements does not exist as a diatomic molecule in nature? Outcome # 1,9) DOK 2)&#10;A) hydrogen&#10;B) nitrogen&#10;C) neon

Accepted Answer

Neon is a noble gas and exists as single atoms (monatomic) in nature, not forming diatomic molecules like hydrogen (H2) and nitrogen (N2) do.

Question 6

What compound does magnesium and nitrogen form? Outcome # 8) DOK 1) A) Mg₃N₂ B) Mg₂N₃ C) MgN

Accepted Answer

Magnesium (Mg) and nitrogen (N) form magnesium nitride, which has the chemical formula Mg₃N₂. This is because magnesium forms a +2 charge and nitrogen forms a -3 charge, requiring three magnesium ions to balance two nitrogen ions.

Question 7

What is the active ingredient in most solid antacids? Outcome # 2) DOK 2) A) CaCO₃ B) CaOH)₂ C) KOH

Accepted Answer

The active ingredient in most solid antacids is calcium carbonate (CaCO3), which neutralizes stomach acid.

Question 8

Which of the following gases are flammable? Outcome # 5) DOK 1)&#10;A) helium&#10;B) hydrogen&#10;C) nitrogen

Accepted Answer

Hydrogen is a flammable gas.

Deck 18: Representative Metals, Metalloids, and Nonmetals