CHM 090: Chapter 1 Review

Atoms

100

Which subatomic particles are in the nucleus?

Protons and Neutrons

200

Which subatomic particle has virtually no mass?

The electron

300

Which two subatomic particles are always the same in a neutral atom?

Protons and Electrons

400

If an atom of Fluorine has 9 protons and 7 electrons, what is the overall charge?

2+

500

When an atom undergoes a change in its charge, it is called an _________. 

Ion

Elements on the Periodic Table

100

Which element has 6 protons and a mass of about 12?

Carbon (C)

200

Which element has the symbol Na?

Sodium

300

Which element has the symbol K?

Potassium

400

What is the atomic number and symbol for gold?

79-Au

500

What is the atomic number and symbol for antimony?

51-Sb

Groups and Families of the Periodic Table

100

What is the name for the elements in Group 16?

Chalcogens

200

Elements that are a part of the staircase are called...(2 Names).

Semimetals or Metalloids

300

What is the name for the bottom two rows that fall outside the rest of the periodic table?

Rare Earth Metals

400

What does the atomic number tell you about the element? (at least two things). 

It tells you how many protons the element has, how many electrons it has, and it identifies the element on the periodic table. 

500

What are horizontal rows called on the periodic table? (2 names)

Periods or Series

Isotopes

100

Isotopes have the _______ number of protons, and a _____________ number of neutrons. 

Same, different. 

200

If you have an isotope of Chromium-58, what is the atomic mass? 

58

300

If you have an isotope of Gallium-71, what is the atomic number?

31

400

²⁵₁₂Mg

How many neutrons are in this isotope of Magnesium?

13

500

³⁷₁₉K

What is the mass of this isotope of potassium?

37

Percent Abundance

100

Boron has two naturally occurring isotopes, ¹⁰B and ¹¹B, which have masses of 10.0129 and 11.0093 amu, respectively. Given the average atomic mass of boron (10.81 amu), determine the percent abundance of each isotope. 

¹⁰B- 20%

¹¹B- 80%

200

Two naturally occurring isotopes of antimony are ¹²¹Sb (57.21%) and ¹²³Sb (42.79%). They have masses of 120.904 and 122.904 amu, respectively. What is the average atomic mass of Sb?

121.76 amu

300

Which one has a higher percent abundance: Ti-48 or Ti-46?

*Use your periodic table. 

Ti-48

400

Which isotope has a higher percent abundance: Ca-40 or Ca-42?

*Use your periodic table. 

Ca-40

500

Which one has the higher percent abundance: Ba-134 or Ba-138?

*Use your periodic table. 

Ba-138