Question 1

Which of the following statements best describes a compound?

Accepted Answer

A compound is a pure substance formed by chemically combining two or more elements together.

Question 2

Which element is a metalloid and is located on the solid line that starts at boron and angles down towards astatine?

Accepted Answer

Silicon (Si)

Question 3

What is the correct chemical symbol for manganese?

Accepted Answer

Mn

Question 4

Which of the following elements is a noble gas?

Accepted Answer

Argon

Question 5

How many protons, neutrons, and electrons are present in a neutral atom of chlorine-35 ($$Z = 17$$, $$A = 35$$)?

Accepted Answer

17 protons, 18 neutrons, 17 electrons

Question 6

Which element has the electron configuration $$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^2$$?

Accepted Answer

Silicon

Question 7

What is the atomic weight of chlorine given the following isotopic abundances and masses: $$^{35}Cl ($$mass = 34.97 amu, abundance = 75.78%), $$^{37}Cl ($$mass = 36.97 amu, abundance = 24.22%)?

Accepted Answer

$$35.45$$ amu

Question 8

Which group of elements is characterized by being soft, shiny metals with low melting points and reacts with water to form basic solutions?

Accepted Answer

Alkali metals

Question 9

What is the electron configuration for potassium ($$Z = 19) in $$noble gas notation?

Accepted Answer

$$[Ar]4s^1$

Question 10

Which of the following best describes the trend in atomic size across a period (row) in the periodic table?

Accepted Answer

Atomic size decreases across a period as the number of protons increases, pulling electrons closer.

Question 11

Which element has 7 valence electrons and is located in group 7A?

Accepted Answer

Chlorine

Question 12

What is the distinguishing electron for bromine?

Accepted Answer

$$4p^5$$

Question 13

Which of the following is NOT a property of metals?

Accepted Answer

Metals are usually poor conductors of heat and electricity.

Question 14

How many electrons can the third shell ($$n = 3) $$hold?

Accepted Answer

$$18$$

Question 15

Which orbital has a spherical shape?

Accepted Answer

s orbital

Question 16

Which element is most likely to form multiple allotropes, such as diamond, graphite, and buckminsterfullerene?

Accepted Answer

Carbon

Question 17

What is the charge and relative mass of a neutron?

Accepted Answer

Charge: 0, Mass: 1 amu

Question 18

Which element has the electron configuration $$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^6$$ $$4s^2$$?

Accepted Answer

Calcium

Question 19

Which of the following elements is a transition metal?

Accepted Answer

Copper (Cu)

Question 20

Which element is represented by the symbol 'Ag'?

Accepted Answer

Silver

Study Guide: chp 2

Study Guide - Practice Questions

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