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Science Vocabulary Week 2 Flashcards | StudBud
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Science Vocabulary Week 2
Science Vocabulary Week 2
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Science vocabulary practice for quiz - Week 2
Flashcards
25 cards
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Questions
25
Answers
1
Electrons are subatomic particles with positive charge.
True
False
2
Alkaline - is synonymous in chemistry with the word "basic," which means "having a pH greater than _______.
7
6
1
15
3
The alkaline elements are not good conductors of electricity.
True
False
4
Combustion, Is it a physical or chemical property?
Physical property
Chemical property
5
A "chemical change" occurs when matter changes into a ____________ and has a new _________ property.
new substance, physical
new substance, chemical
6
Period
- There are 7 periods in the periodic table. The period will indicate the number of electron shells.
True
False
7
The electrons in the outermost shell, or energy level, of an atom are called...
Period
Valence electrons
Bond
Ion
8
Combustion - __________ process in which a substance reacts rapidly with __________ and gives out heat.
chemical, carbon
physical, water
chemical, oxygen
physical, oxygen
9
In a chemical bond, atoms can _____ electrons from their outermost shell to bond and create a new homogeneous substance.
create and destroy
share and destroy
create and share
share or give up
10
Compounds are the result of a chemical reaction.
True
False
11
Chemical bonds can be...
All of the above
Metallic (M+M)
Covalent (NM+NM)
Ionic (M+NM)
12
Noble gases are stable and
unlikely to form chemical bonds
because they have little tendency to gain or lose electrons.
True
False
13
Compound: two or more ______________ that are ______________ combined.
atoms, never
substances, chemically
elements, chemically
solutions, physically
14
Soluble
- _________ to be dissolved when mixed with a _____________.
able, liquid
not able, liquid
able, gas
not able, gas
15
Where are the valence electrons located in an atom?
outmost shell
next to the protons
close to the neutrons
close to the nucleus
16
Carbon Monoxide (CO), and Carbon dioxide (CO2) are examples of...
elements
alkaline
atoms
compounds
17
What are two physical properties of alkaline metals?
They are semiconductors and metallic
They are insulators and they are dull.
Their PH is 4 and they have no luster
They are highly metallic and are good conductors of electricity.
18
Combustion - chemical process in which a substance reacts rapidly with ________ and gives out ________.
oxygen, heat
a compound, heat
carbon dioxide, heat
hydrogen, fire
19
Which is an example of a chemical changes?
Mixing acids and bases
Melting ice
Casting silver in a mold
Shredding paper, cutting tomatoes
20
Sugar, salt, lemon juice, coffee, jelly, and vinegar are all examples of...
compounds
not soluble materials (insoluble)
ions
soluble materials
21
An ion is
a charged atom or molecule
. It is charged because the number of electrons do not equal the number of protons.
True
False
22
What will the period indicate in the periodic table?
The number of electron shells
The number of valence electrons.
Nothing in particular.
23
Negatively charged ions are called anions.
True
False
24
Electrons:
A stable ____________ with a _________ electrical charge. Present with each atom surrounding the nucleus.
subatomic particle, positive
compound, negative
subatomic particle, negative
subatomic particle, neutral
25
Positively charged ions are called anions.
False
True
