Atomic Theory

​TUESDAY 9/6: UNIT 2 – INTRO TO ATOMIC STRUCTURE,

HISTORY OF THE ATOM

• MON 9/12 QUIZ: 35 ELEMENTS

• THURS 9/15- LAB: FLAME TEST/ SPECTRAL ID-You must have your lab safety form turned in

• Fri 9/16 & 9/23 are PLD days

Announcements/Reminders

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Bellwork:

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Agenda

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ON GC​

• Ions & Isotopes

• Practice- PG. 13&14 IN PACKET

• Quizlet live- 35 elements

Multiple Choice

What is the atomic number?

• 35

• 18

• 17

• 52

Multiple Choice

How many protons and electrons does this element have?

• 35

• 18

• 17

• 52

Multiple Choice

How many neutrons does Chlorine have?

• 18

• 17

• 35

• 52

Multiple Choice

Atoms are neutral because the number of

• protons equals the number of neutrons

• protons equals the numbers of electrons

• neutrons is greater than the number of protons

• neutrons is greater than the number of electrons

​Find the number of protons, neutrons and electrons in the following atoms.

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What is the same about these atoms?​_________________________

What is different?_______________________________________​

Multiple Choice

Two atoms that are different isotopes of the same element have

• the same number of protons and same number of neutrons

• the same number of protons but a different number of neutrons

• a different number of protons but the same number of neutrons

• a different number of protons and a different number of neutrons

Multiple Choice

Which two notations represent isotopes of the same element?

Multiple Choice

Which notations represent atoms that have the same number of protons but a different number of neutrons?

• H-2 and He-3

• S-32 and S-32

• Cl-35 and Cl-37

• Ga-70 and Ge-73

Fill in the Blanks

Ions are

Multiple Choice

IN AN ION THE NUMBER OF PROTONS_________ THE NUMBER OF ELECTRONS. 

• >

• <

• =

• ≠

Multiple Choice

Which of these is an ion?

• $$H_2O$$  

• $$CO_2$$  

• $$Li^{\ +2}$$  

• $$4\left(C_6H_{12}O_6\right)$$  

Multiple Choice

IN A POSITIVE ION, THE # OF ELECTRONS _____ # PROTONS

• >

• <

• =

Multiple Choice

IN A NEGATIVE ION, THE # OF ELECTRONS _____ # PROTONS 

• >

• <

• =

Fill in the Blanks

RULE: POSITIVE IONS ARE FORMED WHEN ELECTRONS ARE

.

Fill in the Blanks

RULE: NEGATIVE IONS ARE FORMED WHEN ELECTRONS ARE

.

Multiple Choice

What is a positive ion called?

• anion

• cation

• isotope

• covalent

Multiple Choice

What is a negative ion called?

• anion

• cation

• covalent

• isotope

Multiple Choice

If an atom gains electrons, the charge will be positive.

• true

• false

Multiple Choice

If an atom loses electrons, it becomes a negative ion.

• True

• False

Multiple Choice

What is the charge of an atom that has lost one electron?

• -1
• -2
• +1
• +2

Multiple Choice

If an ion has a positive charge you would __________ the charge number from the number of protons to figure out how many electrons there are.

• subtract

• add

• multiply

• divide

Multiple Choice

If an ion has a negative charge you would __________ the charge number to the number of protons to figure out how many electrons there are.

• Add

• Subtract

• Divide

• Multiply

Multiple Choice

The diagrams below show atoms losing or gaining electrons. If an atom loses an electron, it becomes smaller. If an atom gains electrons it gets bigger.

Tick one box to show whether electrons are being gained or lost

and show the overall charge it is carrying.

• neutral=> negative, gained

• positive => negative, lost

• negative=> positive, gained

• neutral=> positive, lost

Multiple Choice

The diagrams below show atoms losing or gaining electrons. If an atom loses an electron, it becomes smaller. If an atom gains electrons it gets bigger.

Tick one box to show whether electrons are being gained or lost

and show the overall charge it is carrying.

• neutral==> negative, gained

• neutral==> positive, gained

• neutral==> negative, lost

• positive==> negative, gained

Multiple Choice

How many protons does $$Na^{2-}$$  have?

• 9

• 10

• 11

• 12

Multiple Choice

• element

• atomic number

• atomic mass

• number of neutrons

Multiple Choice

• element

• atomic number

• atomic mass

• number of neutrons