What is the atomic number?

the number of protons in the nucleus

What is the Periodic Table?

A table that organizes elements by their properties

What is the matter in chemistry?

Which have specific chemical and physical properties and cannot be broken.

What is the definition of organic chemistry?

branch of chem that deals with compounds containing carbon

How do you calculate the atomic mass?

Add the protons and neutrons of an atom

Why are atoms electrically neutral?

Protons and electrons cancel out each other’s charge.

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Physical Science Review

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Questions 25

Answers

1
In any element, the atoms are exactly alike.
False
True
2
What is the atomic number?
The number of protons in the electron cloud
the number of protons in the nucleus
The number of neutrons in the nucleus
The number of electrons in the electron cloud
3
Physical; not from living organisms.
Organism
Abiotic
Biotic
4
What is science?
All of these
A way of getting & analyzing evidence re: the natural world.
A way of observing
A way of thinking
5
Are rows the vertical or horizontal lines on the periodic table?
Horizontal
Neither
Vertical
Both
6
Who created the periodic table?
Galileo Galilei
Dimitri Mendeleev
Albert Einstein
Isaac Newton
7
When Mendeleev created the first periodic table the elements were put in a specific order based on what?
Who?
Increasing atomic number
Decreasing electrons
Increasing atomic mass
8
How many elements are there?
118
70
200
119
9
what does this symbol represent in a chemistry lab
Death
Toxic
Radioactive
Poison
10
Atoms that are bonded together form a ?
element
molecule
glob
Big atom
11
what is the atomic number of hydrogen
3
56
4
1
12
What is the Periodic Table?
A table that organizes elements by their properties
A table that shows elements in random order
A puzzle that, if put together right, creates a new planet
A table that organizes elements in alphabetical order
13
What element has the atomic number 7
Oxygen
Calcium
nitrogen
Neon
14
The atoms that create water,H20 are?
carben
germanium and thorium
hydrogen and carben
hydrogen and oxogen
15
Are groups the vertical or horizontal lines on the periodic table?
Horizontal
Both
Vertical
Neither
16
What is the matter in chemistry?
Between the ecosystem and the physical environment.
The term matter refers to anything that occupies space and has mass.
The flow of matter in an ecosystem is not like energy flow.
Which have specific chemical and physical properties and cannot be broken.
17
Properties such as shape, size, colour and state of a substance are called it's___
Change in description
Physical properties
Chemical change
None
18
What is the definition of organic chemistry?
the branch of chem w/ compounds that don't contain carbon
branch of chem that deals with compounds containing carbon
19
A human hair is _____ atoms across?
1,000
30
10
100
20
The atomic nucleus consists of what particles?
electron and neutron
proton and electron
proton and neutron
proton, neutron, and electron
21
Physical or chemical? iron rusting
chemical
Physical
22
How do you calculate the atomic mass?
CHEESE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Add the electrons and protons of an aatom
Add the protons and neutrons of an atom
Add the electrons and neutrons of an atom
23
A Physical Scientist might study_________.
The planets
Crops
Stars
A Chemical Reaction
24
Why are atoms electrically neutral?
Protons and electrons cancel out each other’s charge.
There are more protons than electrons in atoms.
Neutrons carry no charge.
The neutrons balance out any charge.
25
To be useful in science, a hypothesis must:
Be measureable
Be observable
Be correct
Be testable

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