Unit 2 Atomic Structure & Periodic Table Study Guide

Multiple Choice
Identify the choice that best completes the statement or answers the question.

____	1.	The sum of the protons and neutrons is called the _______.
a.	Atomic Mass	c.	both A & C	
b.	Atomic Number	d.	phone number	

____	2.	A common isotope of Carbon has a mass number of 13. The total number of subatomic particles in the nucleus would be:
a.	19	c.	12	
b.	13	d.	6	

____	3.	Do any of the atom diagrams below represent atoms of the same element?

a.	No, they are all different elements.	c.	Yes, all of the atoms are the same element.	
b.	Yes, atom A and atom B are the same element.		d.	Yes, atom A and atom C are the same element.	

____	4.	Chlorine, atomic number 17, is located in the third row and the next-to-the-last column of the periodic table. How many electron shells (energy levels) would be completely filled by an atom of chlorine? How many electrons would be left over?
a.	1 shell filled, 7 electrons left over	c.	2 shells filled, 7 electrons left over	
b.	1 shell filled, 1 electron left over	d.	2 shells filled, 1 electron left over	

____	5.	What is the Atomic Mass of the nucleus below?

a.	6	c.	13	
b.	7	d.	14	

____	6.	A scientist has found the following isotope of oxygen: O-19.  How many neutrons are present in this isotope?
a.	8	c.	19	
b.	11	d.	27	

____	7.	Compare the elements in Group one as you move from the top (H) down to the bottom (Fr). Which statement is true?
a.	The elements change from gas to liquid to solid.		c.	The elements become more reactive.	
b.	The element form higher charged ions.		d.	The elements change from metals to metalloids to nonmetals.	

____	8.	What is the name and atomic mass of an atom that has the following numbers of subatomic particles?
21 neutrons
18 protons
18 electrons
a.	Sc-39	c.	Ar-40	
b.	Sc-45	d.	Ar-39	

Short Answer

	9.	Explain the difference between the atomic number and atomic mass of an element.

	10.	Draw the electron configeration for the element Boron

	11.	Explain what an Isotope is. How can you calculate the number of neutrons in the nucleus of an atom.

	12.	What is the name of each of the following elements, and classify it as a metal, a nonmetal, or a metalloid: H, Si, Cl, Fe

	13.	List 3 properties of a metal.

	14.	Where are the metals, metalloids, and nonmetals located on the periodic table?

	15.	List 3 properties of a nonmetal.

	16.	What element has 31 electrons, 31 protons, and 39 neutrons?

	17.	What element is in Group 2, Period 3?

	18.	The order of elements in the periodic table is based on the number of ________________ in the nucleus.

	19.	Isotopes of an element have the same atomic ______________ but different atomic ______________.

	20.	Draw and label the following parts of an element from the periodic table: Element Symbol, Element Name, Atomic Mass, and Atomic Number

	21.	Neutrons and protons are found in the __________ of an atom.

	22.	Explain how a chemist defines a metal, and explain the difference between metals and nonmetals.

	23.	The ___________________ are located in the center of the periodic table

	24.	Atoms have equal numbers of ____________________ and ____________________.

	25.	The order of elements in the periodic table is based on the number of _________________ in the nucleus.

	26.	Because atoms of elements in the same group of the periodic table have the same number of _______________________, they have similar properties.

Other

	27.	ATOMIC STRUCTURE – COMPLETE THE FOLLOWING TABLE.
	Isotope Name	Atomic #	Mass #	p	n	e	#of Energy Levels	# Valence Electrons	
	hydrogen-2								
		1	1						
				6	6				
1.				7	3					
2.		chlorine-35								
3.			19			20				
4.				24	12					
5.			33	74						
6.					47	62				
7.				107					47	
8.			16			16				
9.		uranium-235								

Unit 2 Atomic Structure & Periodic Table Study Guide
Answer Section

MULTIPLE CHOICE

	1.	ANS:	A	PTS:	1

	2.	ANS:	B	PTS:	1

	3.	ANS:	D	PTS:	1

	4.	ANS:	C	PTS:	1

	5.	ANS:	C	PTS:	1

	6.	ANS:	B	PTS:	1

	7.	ANS:	C	PTS:	1

	8.	ANS:	D	PTS:	1

SHORT ANSWER

	9.	ANS:	
Atomic Structure is the number of protons found n the nucleus.
Atomic mass is the total number of protons and neutrons found in the nucleus.

PTS:	1	REF:	Ch1.L1	STA:	MM1A1e	TOP:	Pre Test

	10.	ANS:	

PTS:	1

	11.	ANS:	
Isotopes are elements that have the same number of protons, but different numbers of neutrons. Isotopes alsohave a different mass number, and have characteristics similar to, but slightly different from their other isotopes.

PTS:	1

	12.	ANS:	
H -Hydrogen - Nonmetal / Si - Silicon - Metalloid / Cl - Chlorine - Nonmetal / Fe - Iron - Metal

PTS:	1

	13.	ANS:	
Metals can conduct heat and electricity. Metals are ductile, meaning they can be pulled into a wire and malleable, meaning they can be shaped.

PTS:	1

	14.	ANS:	
Metals are on the left, Metalloids are between the metals and nonmetals, and the nonmetals are on the right.

PTS:	1

	15.	ANS:	
Nonmetals are brittle, dull, gas at room temperature, and poor conductors of electricitity

PTS:	1

	16.	ANS:	
Gallium

PTS:	1

	17.	ANS:	
Magnesium

PTS:	1

	18.	ANS:	
protons

PTS:	1

	19.	ANS:	
Atomic Number & Atomic Mass

PTS:	1

	20.	ANS:	

PTS:	1

	21.	ANS:	
nucleus

PTS:	1

	22.	ANS:	
Metals are elements that exist usually as solids and can conduct heat and electricity. Nonmetals may exist as solids, liquids, or gases and do not conduct heat or electricity.

PTS:	1

	23.	ANS:	
transition metals

PTS:	1

	24.	ANS:	
protons & electrons

PTS:	1

	25.	ANS:	
protons

PTS:	1

	26.	ANS:	
Valence Electrons

PTS:	1

OTHER

	27.	ANS:	
Use the Periodic Table to help answer the table.

PTS:	1