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Chemistry - Chapter : Fundamentals of Chemistry Flashcards | StudBud
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Chemistry - Chapter : Fundamentals of Chemistry
Chemistry - Chapter : Fundamentals of Chemistry
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SHRI CHAITANYA CLASS 7th Test
Flashcards
37 cards
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Practice quiz
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Questions
37
Answers
1
Dmitri Mendeleev developed the periodic table of the elements, which does what with elements?
Measures
Classifies
Alphabetizes
Weighs
2
What are substances that has only one kind of atom?
Elements
Protons
Indicators
Periods
3
What is a reaction in which molecules combine to form a new substance?
Mutual Exchange
Ion
Decomposition
Synthesis
4
What is
58.93
at the bottom?
Atomic Number
Element Name
Chemical symbol
Atomic Mass
5
What are the the ←
horizontal→
rows on the periodic table of elements called?
Families
Groups
Periods
Metals
6
The sum of the number of protons and neutrons results in an atom’s approximate what?
Electrons
Atomic Number
Atomic Mass
pH scale
7
What is
Cobalt
above the Co?
Chemical symbol
Atomic Mass
Element Name
Atomic Number
8
Which scientist developed a simplified model of an atom based on the idea that electrons move in shells?
Niels Bohr
Robert Boyle
Ernest Rutherford
Dmitri Mendeleev
9
What are molecules formed from two or more different elements called?
Ions
Compounds
Chemical Reactions
Alkalis
10
Name this part of the atom (Neutral)
Nucleus
Neutron
Proton
Outer Shell
11
Which reaction occurs when a compound is
broken down into simpler compounds
?
Synthesis
Combustion
Replacement
Decomposition
12
Which type of bond forms crystals?
Covalent
Ionic
Shared
Crystalline
13
What is
27
in the top left?
Element Name
Atomic Mass
Atomic Number
Chemical symbol
14
What is formed when positively and negatively charged ions attract each other?
Neutron
Indicator
Ionic Bond
Covalent Bond
15
In a periodic table, the atomic _________ is based on the number of protons in the nucleus
Salt
Element
Mass
Number
16
What is
Co
in the middle?
Element Name
Atomic Mass
Atomic Number
Chemical symbol
17
Name this part of the atom (Negative)
Proton
Electron
Inner Shell
Outer Shell
18
Name this part of the atom
Nucleus
Proton
Outer Shell
Neutron
19
Which scientist developed the periodic table of the elements?
Ernest Rutherford
Niels Bohr
Robert Boyle
Dmitri Mendeleev
20
What are the
↑
vertical
↓
columns of the periodic table called?
Protons
Periods
Groups
Atoms
21
Name this part of the atom (Positive)
Electron
Proton
Inner Shell
Neutron
22
What is the center part of an atom?
Neutron
Proton
Electron
Nucleus
23
Atoms bond with other atoms to complete their outer
what
?
Mass
Coat
Shells
Smells
24
Name this part of the atom
Neutron
Proton
Nucleus
Outer Shell
25
Abbreviations for the names of elements are called what?
Chemical Periods
Chemical Symbols
Chemical Families
Chemical Shells
26
The atomic number is based off the number of
what
in an element?
Neutrons
Electrons
Protons
Protons AND Neutrons
27
Which part of the atom has a
negative (-)
charge?
Proton
Nucleus
Electron
Neutron
28
How many atoms of carbon are in the compound
H
2
CO
3
?
Two
Three
One
Zero
29
Name this part of the atom
Inner Shell
Neutron
Electron
Proton
30
What doe you call the study of
matter
?
Chemistry
Astronomy
Science
Physics
31
What are atoms that have gained or lost electrons called?
Ions
Elements
Compounds
Molecules
32
What is it called when symbols and numbers are used to shorten the name of a compound? (Like H
2
O)
Chemical Reaction
Alkali
Molecule
Chemical Formula
33
What is the tiniest recognizable part of an element called?
Neutron
Electron
Atom
Nucleus
34
What is the process of joining different types of atoms to form a different substance?
Molecule
Alkali
Chemical Reaction
Chemical Formula
35
In what do atoms share electrons?
Covalent Bond
Salt
Element
Ionic Bond
36
The number of protons plus neutrons is the atom’s approximate what?
Atomic Model
Atomic Number
Atomic Nucleus
Atomic Mass
37
Which part of the atom has a
positive (+)
charge?
Proton
Shell
Electron
Neutron
