Question 1

Which element below has the most metallic character based on periodic table trends?

Accepted Answer

Sodium (Na)

Question 2

How many valence electrons does sulfur (S) have?

Accepted Answer

6

Question 3

Which element has the larger atomic radius: magnesium (Mg) or sodium (Na)?

Accepted Answer

Sodium (Na)

Question 4

What is the electron dot formula for chlorine (Cl)?

Accepted Answer

$$\mathrm{Cl}\cdot\cdot\cdot\cdot\cdot\cdot\cdot$$

Question 5

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

Accepted Answer

Calcium (Ca)

Question 6

What is the complete electron configuration for the $$\mathrm{O}^{2-}$$ ion?

Accepted Answer

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

Question 7

What is the chemical formula for ammonium sulfate?

Accepted Answer

$$\mathrm{NH_4$}_2\mathrm{SO_4$}$$

Question 8

Which of the following acids has the formula $$\mathrm{H_2SO_4}$$?

Accepted Answer

Sulfuric acid

Question 9

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

Accepted Answer

Sodium carbonate

Question 10

Classify the following reaction: $$\mathrm{2Na + 2H_2O \rightarrow 2NaOH + H_2$}$$

Accepted Answer

Single displacement

Question 11

Balance the following equation: $$\mathrm{Al + O_2$ \rightarrow Al_2O_3}$$

Accepted Answer

$$\mathrm{4Al + 3O_2 \rightarrow 2Al_2O_3}$$

Question 12

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

Accepted Answer

No, copper does not react with water

Question 13

Which compound is soluble in water according to the solubility rules: $$\mathrm{Na_2SO_4}$$, $$\mathrm{$$BaSO_4$$}$$, $$\mathrm{$$PbSO_4$$}$$, $$\mathrm{$$CaSO_4$$}$$?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 14

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

Accepted Answer

$$\mathrm{NaCl + H_2O}$$

Question 15

Which metal will react with water at room temperature: magnesium (Mg), sodium (Na), zinc (Zn), or iron (Fe)?

Accepted Answer

Sodium (Na)

Question 16

Which compound is insoluble in water: $$\mathrm{AgCl}$$, $$\mathrm{NaCl}$$, $$\mathrm{KCl}$$, $$\mathrm{NH_4Cl}$$?

Accepted Answer

$$\mathrm{AgCl}$$

Question 17

What is the formula for hydrogen phosphate?

Accepted Answer

$$\mathrm{$$HPO_4$$}^{2-}$$

Question 18

Which of the following ions is generally insoluble in water unless paired with alkali metals or ammonium: $$\mathrm{CO_3$^{2-}}$$, $$\mathrm{NO_3$^{-}}$$, $$\mathrm{Cl$$^{-}$$}$$, $$\mathrm{SO_4$^{2-}}$$?

Accepted Answer

$$\mathrm{CO_3$^{2-}}$$

Question 19

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

Accepted Answer

A precipitate of $$\mathrm{$$BaSO_4$$}$$ will form

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

Guida di studio - Domande di pratica

Study guide - Flashcard