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MOD 2 Standard 3 The Periodic Table Flashcards | StudBud
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MOD 2 Standard 3 The Periodic Table
MOD 2 Standard 3 The Periodic Table
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7th grade pt unit
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
Elements in the second group have 2 valence electrons. What are they called?
Alkali Metals
Halogens
Alkaline Earth Metals
Transition Metals
2
What property of metalloids makes them valuable in the manufacture of computers?
they are insulators
they are semi-conductors
they are brittle
they are gases
3
Oxygen has how many protons?
15
16
6
8
4
All of the following are characteristics of METALS except:
brittle
good conductors
malleable
ductile
5
Elements in Group 17 are known as "Salt Formers" They are called __________
Metalloids
Transition Metals
Halogens
Noble Gases
6
What is the approximate atomic mass of Sulfur
6
33
32
16
7
Who took Dmitri's periodic table ONE step further and what did he do?
Mosely - arranged ellements by atomic number
Aristotle-claimed elements were earth, fire, water, air
Democritus-said elements made of tiny "atomos"
Bohr-found that electrons traveled in energy levels
8
The elements to the right of the zig zag line are known as .....
Metals
Transition metals
Metalloids
Non Metals
9
How many periods are found on the Periodic Table?
3
5
18
7
10
The _____ is the number of protons or electrons a stable atom has.
Atomic Number
Valence Number
Group Number
Atomic Mass
11
Elements in the first group are extremely reactive. What is the name of this group?
Alkali Metals
Halogens
Noble Gases
Alkaline Earth Metals
12
The elements to the left of the zig zag line which take up 75% of the table are called .....
Non Metals
Metals
Metalloids
13
which of the following elements would react with water?
Potassium
Chlorine
Calcium
Sulfur
14
Elements in group 18 are said to be "inert" which means they rarely react. They are called....
Noble Gases
Metalloids
Non Metals
Alkali Metals
15
Silicon is part of which group?
One Direction
Metalloids
Halogens
Alkali Metals
16
The Vertical Columns in the Periodic Table are called...
Valence Electrons
Groups
Periods
Elements
17
As you go down the Periodic Table, Atomic Mass .....
Increases
Stays the Same
Decreases
18
The number of _____ determines an element's identity
Likes
Neutrons
Electrons
Protons
19
Which of these is NOT a property of NONMETALS?
shiny
insulator
dull
brittle
20
Atomic Mass is determined by the number of ....
Protons + Neutrons
Protons
Electrons and Neutrons
Electrons
21
Do elements in the same period have similiar properties?
No
Yes
22
How many Valence electrons does Nitrogen have?
7
5
14
15
23
Elements in groups 3 through 12 have many useful properties. They are known as _________
Transition Metals
Metalloids
Halogens
Noble Gases
24
The elements that touch the Zig Zag Line are called
Metalloids
Gases
Metals
Non Metals
25
The Father of the Periodic Table is named
John Dalton
Neils Bohr
Dimitri Mendeleev
Albert Einstein
