How do you find the number of neutrons in an atom?

Subtract the number of protons from the mass number

Atoms w/ the same # of protons but a different # of neutrons

Atomic mass is the mass of an element...

based on the average mass of all isotopes

A positively charged particle found in the nucleus

An atom is neutral because...

Atoms have the same number of protons and electrons

To find the mass number of an atom you...

Add the number of protons and the number of neutrons

How did Rutherford come up with this model of the atom?

Through his gold foil experiment

What is the Law of Multiple Proportions?

Elements can combine in more than one way to form compounds

The study of turning metals into gold

What is the Law of Conservation of Matter?

Matter is neither created nor destroyed in a chem reaction

A negatively charged particle found outside the nucleus

Aristotle believed that...

Matter is composed of Earth, Wind, Fire, Air, & Quintessence

What is a cathode ray tube?

A device that emits a beam of electrons

The dense positively charged center of atoms made up of p &n

A neutral particle found in the nucleus

What is the Law of Definite Proportions?

Elements combine in the same ratio by mass to form compounds

Democritus believed that...

Matter is made of tiny indivisible particles called atomos

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Chapter 3 Chem Review

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Questions 42

Answers

1
How do you find the number of neutrons in an atom?
Add the number of protons to the number of electrons
Add the number of protons to the number of neutrons
Subtract the number of protons from the mass number
Subtract the number of electrons from the mass number
2
Who discovered the atomic neutron?
Moseley
Rutherford
Goldstein
Chadwick
3
What is an isotope?
Atoms w the same # of protons but a different # of electrons
Atoms w/ the same # of neutrons but a different # of protons
Atoms w/ the same # of protons but a different # of neutrons
Atoms w the same # of electrons but different # of neutrons
4
Atomic mass is the mass of an element...
based on the average mass of all isotopes
based on the average mass of all elements
based on the sum of the mass of all isotopes added together
based on the atomic number divided by the # of isotopes
5
Who discovered the electron?
Aristotle
Lavoisier
Proust
Thomson
6
A proton is...
A positively charged particle found outside the nucleus
A negatively charged particle found in the nucleus
A positively charged particle found in the nucleus
A negatively charged particle found outside the nucleus
7
Which of the following is part of Dalton's atomic theory?
All of the above
All atoms of a given element are identical
Atoms can neither be created or destroyed
Atoms of different elements have different masses
8
An atom is neutral because...
Atoms have the same number of protons and neutrons
They want to be
Atoms have the same number of electrons and neutrons
Atoms have the same number of protons and electrons
9
Who discovered the three types of radiation?
Thomson
Dalton
Lavoisier
Rutherford
10
What is the name of this atomic model?
Planetary
Rutherford
Plum Pudding
Bohr
11
Who created this model of the atom?
Rutherford
Dalton
Bohr
Jimmy Neutron
12
The Z in this picture stands for...
Atomic number
Mass number
Element symbol
13
Who discovered the atomic number?
Goldstein
Rutherford
Chadwick
Moseley
14
Who came up with the Law of Conservation of Matter?
Proust
Lavoisier
Thomson
Rutherford
15
What is the name of this atomic model?
Bohr
Planetary
Jimmy Neutron
Plum Pudding
16
The A in this picture stands for...
The element symbol
Atomic number
Mass number
17
Who created this model?
Dalton
Bohr
Rutherford
Thomson
18
The number of protons, electrons, and neutrons in an atom are the same; true or false?
True
False
19
Who created the Law of Definite proportions?
Lavoisier
Dalton
Thomson
Proust
20
To find the mass number of an atom you...
Subtract the number of protons from the number of neutrons
Subtract the number of electrons from the number of neutrons
Add the number of protons and electrons
Add the number of protons and the number of neutrons
21
How did Rutherford come up with this model of the atom?
Though his sapphire foil experiment
Through the silver foil expdriment
Through his platinum foil experiment
Through his gold foil experiment
22
Each element has its own unique number of ______ that determines its ________?
electrons/atomic number
protons/atomic number
protons/mass number
electrons/mass number
23
Who discovered the proton?
Rutherford
Goldstein
Moseley
Chadwick
24
What is this?
A flask
A piece of equipment used in Chemistry
A beaker
A cathode ray tube
25
What were the original 4 elements?
Earth, Fire, Air, and Water
None of the above
Earth, Hot, Dry. and Fire
Hot, Cool, Dry, and Moist
26
What is the Law of Multiple Proportions?
Elements can combine in more than one way to form compounds
Matter is neither created nor destroyed in a chem reaction
Elements combine in the same ratio by mass to form compounds
27
What is alchemy?
The study of turning metals into gold
A fictional term used in Harry Potter
The study of turning metals into water
The study of turning metals into silver
28
What is the Law of Conservation of Matter?
Made is created and destroyed in a chemical reaction
Matter is neither created nor destroyed in a chem reaction
Pholgistan is released from matter during a chem reaction
29
What did the gold foil experiment prove?
That an atom is mostly empty space
An atom contains a tiny, dense positively charged nucleus
Both A and B are correct
An atom contains a tiny, dense negatively charged nucleus
30
The X in this picture stands for...
Atomic number
Mass number
Element symbol
31
Who created the Law of Definite proportions?
Lavoisier
Thomson
Proust
Dalton
32
An electron is...
A positively charged particle found outside the nucleus
A positively charged particle found in the nucleus
A negatively charged particle found outside the nucleus
A negatively charged particle found in the nucleus
33
Aristotle believed that...
Matter is made of tiny indivisible particles called atomos
Matter is composed of protons, neutrons, and electrons
Matter is composed of Earth, Wind, Fire, Air, & Quintessence
Matter is composed of matter
34
What is a cathode ray tube?
A device that emits a beam of protons
A device that emits a beam of neutrons
A device that emits a beam of electrons
A device that emits a beam of light
35
What is the nucleus?
The dense positively charged center of atoms made up of n
The dense positively charged center of atoms made up of e &n
The dense positively charged center of atoms made up of p& e
The dense positively charged center of atoms made up of p &n
36
Who thought that the original four elements were; Earth, Wind, Fire, and Water?
Lavoisier
Thomson
Democritus
Aristotle
37
A neutron is...
A neutral particle found in the nucleus
A positively charged particle found outside the nucleus
A neutral particle found outside the nucleus
A negatively charged particle found in the nucleus
38
What is the Law of Definite Proportions?
Matter is neither created nor destroyed in a chem reaction
Elements combine in the same ratio by mass to form compounds
Elements can combine in more than one way to form compounds
39
Which of the following is a type of radiation?
All of the above
Gamma
Alpha
Beta
40
What is the answer to the life, the universe, and everything?
Money
42
Friendship
Love
41
What is transmutation?
Changing metals into gold
Changing metals into water
Changing metals into silver
A fictitious word
42
Democritus believed that...
Matter is composed of Earth, Wind, Fire, Air, & Quintessence
Matter is made of tiny indivisible particles called atomos
Matter is composed of protons, neutrons, and electrons
Matter is composed of matter

Chapter 3 Chem Review Flashcards | StudBud