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Unit 2 Structure and Organization of Matter Flashcards | StudBud
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Unit 2 Structure and Organization of Matter
Unit 2 Structure and Organization of Matter
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#Atomic Theory, #Periodic Table, #Ionic and Covalent Bonds, #Counting Atoms, #Balancing Equations
Flashcards
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Questions
36
Answers
1
An atom that gains or loses an electron is a
Isotope
Molecule
Ion
New element
2
How many molecules? 4H
2
O
2
16
4
2
8
3
What class of elements are poor conductors, brittle, and dull?
Metalloids
Metals
Semi-metals
Nonmetals
4
Most elements are ______ are room temperature.
Gas
Plasma
Solid
Liquid
5
What are the reactants in the following equation? 2H
2
+ O
2
→ 2H
2
O
2H2 + O2
2H2O
6
An atom's identity is related to the number of
Protons
Compounds
Neutrons
Electrons
7
An atom that gains or loses a proton is a
Ion
New element
Molecule
Isotope
8
The number 12 is a ______. 3C
6
H
12
O
6
Subscript
Coefficient
Superscript
Exponent
9
How many neutrons does Hydrogen have?
1
0
10
2
10
How many total atoms? 4H
2
O
2
4
16
2
8
11
A type of chemical bond between a nonmetal and a nonmetal.
Ionic
Covalent
12
How many valence electrons does Helium have?
8
1
18
2
13
How many electrons does Xenon have?
77
54
131
8
14
Is the following equation endothermic or exothermic? 6H2O + 6CO2 + Light Energy → C6H12O6 + 6O2
Exothermic
Endothermic
15
What is the atomic number of Xenon?
8
54
77
131
16
Which of the following is an example of a covalent bond?
NaCl
KI
BeF2
H2S
17
How many valence electrons does Fluorine have?
2
17
9
7
18
Which scientist proposed that the atom was mostly empty space?
Dalton
Rutherford
Bohr
Chadwick
19
How many protons does Xenon have?
8
54
131
77
20
Where are the most reactive metals found?
Transition Metals
Alkali Metals
Halogens
Alkaline Earth Metals
21
Which scientist saw the atom as positively charged sphere with electrons embedded within?
Dalton
Thomson
Rutherford
Bohr
22
What are the elements touching the stair-step (zig-zag) line called?
Metalloids
Nonmetals
Semi-metals
Metals
23
The element Lithium (Li) is most like which other element?
Beryllium (Be)
Calcium (Ca)
Sodium (Na)
Boron (B)
24
A type of chemical bond in which the electrons are shared.
Covalent
Ionic
25
How many valence electrons does Calcium have?
12
20
2
4
26
What class of elements are good conductors, shiny, and malleable?
Semi-metals
Metals
Metalloids
Nonmetals
27
How many neutrons does Xenon have?
131
54
77
8
28
Which scientist proposed a model of the atom with electrons orbiting the nucleus?
Rutherford
Dalton
Thomson
Bohr
29
An atom that has gained or lost a neutron is a
Atom
Ion
Isotope
Molecule
30
All of the elements in the same group/family have the same number of ______?
Atomic Mass Units
Protons
Valence Electrons
Neutrons
31
A type of chemical bond in which electrons are transferred (given or taken).
Ionic
Covalent
32
A type of chemical bond between a metal and a nonmetal.
Covalent
Ionic
33
What is the atomic number of an element that has 9 protons and 10 neutrons?
1
9
19
10
34
Most nonmetals are ______ are room temperature.
Liquid
Plasma
Solid
Gas
35
What is the atomic mass of Xenon?
8
131
77
54
36
The number 3 is a ______. 3C
6
H
12
O
6
Subscript
Coefficient
Exponent
Superscript
