Question 1

Which element below has the most metallic character according to periodic table trends?

Accepted Answer

Sodium (Na)

Question 2

How many valence electrons does phosphorus (P) have?

Accepted Answer

5

Question 3

Which element has the larger atomic radius: magnesium (Mg) or sulfur (S)?

Accepted Answer

Magnesium (Mg)

Question 4

Which element has the higher ionization energy: potassium (K) or calcium (Ca)?

Accepted Answer

Calcium (Ca)

Question 5

What is the complete electron configuration for the chloride ion ($$\mathrm{Cl^-}$$)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^6$$

Question 6

What is the chemical formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 7

What is the systematic name for $$\mathrm{Na_2CO_3}$$?

Accepted Answer

Sodium carbonate

Question 8

Classify the following reaction: $$\mathrm{2KBr + Cl_2$ \rightarrow 2KCl + Br_2$}$$

Accepted Answer

Single displacement

Question 9

Complete and balance the following equation: $$\mathrm{HCl + NaOH \rightarrow}$$

Accepted Answer

$$\mathrm{NaCl + H_2O}$$

Question 10

Predict whether a reaction occurs when copper (Cu) is placed in water at room temperature.

Accepted Answer

No, copper does not react with water at room temperature.

Question 11

Which compound is soluble in water according to the solubility rules: $$\mathrm{K_2SO_4}$$, $$\mathrm{$$BaSO_4$$}$$, $$\mathrm{$$PbSO_4$$}$$, $$\mathrm{$$CaSO_4$$}$$?

Accepted Answer

$$\mathrm{K_2SO_4}$$

Question 12

Which of the following ions is generally insoluble in water unless paired with an alkali metal or ammonium ion?

Accepted Answer

Phosphate ($$\mathrm{PO_4$^{3-}})$$

Question 13

Which metal will react with water at room temperature to release hydrogen gas?

Accepted Answer

Sodium (Na)

Question 14

What is the formula for hydrogen carbonate (bicarbonate) ion?

Accepted Answer

$$\mathrm{$$HCO_3$$^-}$$

Question 15

Which of the following compounds will NOT precipitate when mixed in aqueous solution: $$\mathrm{$$AgNO_3$$}$$ and $$\mathrm{NaCl}$$?

Accepted Answer

A precipitate of $$\mathrm{AgCl}$$ forms.

Question 16

Which of the following is the correct electron dot formula for nitrogen (N)?

Accepted Answer

N with 5 dots around it

Question 17

Which compound is classified as a base?

Accepted Answer

$$\mathrm{NaOH}$$

Question 18

A solution contains $$\mathrm{Ca$$^{2+}$$}$$ and $$\mathrm{SO_4$^{2-}}. $$What will happen when they are mixed?

Accepted Answer

A precipitate of $$\mathrm{$$CaSO_4$$}$$ forms.

Question 19

Which of the following is the correct formula for potassium chromate?

Accepted Answer

$$\mathrm{K_2CrO_4}$$

Question 20

Which of the following reactions is a neutralization reaction?

Accepted Answer

$$\mathrm{$$HNO_3$$ + NaOH \rightarrow $$NaNO_3$$ + H_2O}$$

Intro to Chemistry Study Guide: Periodic Table, Compounds, and Reactions

Guida di studio - Domande di pratica

Study guide - Flashcard