The nucleus of an atom is

the central core and is composed of protons and neutrons

The atomic mass of an element depends upon the

mass and relative abundance of each isotope of that element

The nucleus of an atom is

a central core and is composed of protons and neutrons

What does the atomic number identify?

The number of protons of a given atom.

Dalton's atomic theory included which idea?

Atoms of the same element are always identical

Which discovery did J.J Thomson make that improved upon Dalton's atomic Theory?

Atoms contain tiny, negatively charged electrons

How many protons, electrons, and neutrons dos an atom with atomic # 50 and mass # 125 contain?

50 Protons, 50 Electrons, 75 Neutrons

Which of the following of Dalton's theory has to be revised?

atoms are tiny indivisible particles

Which of the following was one of Dalton's improvements over Democritus's ideas?

Atoms retain their identity in a chemical reaction

studbud

Chemistry Chapter 4

23 termsStudBud Administration790 plays

Students will be tested on their knowledge of isotopes and ions. Based on #NGSS #HS-PS1-1. #Chemistry #grade9 #grade10 #grade11 #science #isotopes #ions

Flashcards23 cardsFPractice quizPHost liveL

Questions 23

Answers

1
How are atoms different from other atoms?
Different number of electrons.
Different number of protons
2
The nucleus of an atom is
positively charged and has more protons than neutrons
negatively charged and has a high density
negatively charged and has a low density
the central core and is composed of protons and neutrons
3
What is the complete symbol for a cobalt atom with a mass number of 60?
B
A
C
D
4
The atomic mass of an element depends upon the
mass of each electron in that element
mass and relative abundance of each isotope of that element
mass of each isotope of that element
relative abundance of protons in that element
5
The nucleus of an atom is
a central core and is composed of protons and neutrons
negatively charged and has a high density
negatively charged and has a low density
positively charged and has more protons than neutrons
6
The number of protons + neutrons in an atomic nucleus is referred to as what?
Atomic number
Mass number
Molar mass
Isotope number
7
What does the atomic number identify?
The number of protons + neutrons of a given atom.
The number of protons of a given atom.
The number of neutrons of a given atom.
The number of elections of a given atom.
8
How many neutrons are in the isotope Carbon-14?
8
6
12
14
9
How many protons are in the following atom?
189
207
125
82
10
Which subatomic particle is used to identify the atom, as it never changes?
Proton
Neutron
Electron
11
Dalton's atomic theory included which idea?
Individual atoms can be seen with a microscope
Atoms of the same element are always identical
Atoms of different elements always combine in one-to-one ratios
All atoms of all elements are the same size
12
Isotopes of the same element have different
chemical behavior
mass numbers
positions on the periodic table
atomic numbers
13
Which discovery did J.J Thomson make that improved upon Dalton's atomic Theory?
Atoms contain tiny, positively charged nucleus
Atoms are always in motion
Atoms contain tiny, negatively charged electrons
Atoms that combine do so in whole-number ratios
14
A subatomic particle with no charge
neutron
proton
electron
15
Rutherford came up with what experiment?
Gold Foil Experiment
Gold Ray Experiment
Cathode Ray Experiment
Oil Drop Experiment
16
How many neutrons are in the nucleus of the following atom:
61
155
47
108
17
How many protons, electrons, and neutrons dos an atom with atomic # 50 and mass # 125 contain?
70 neutrons, 75 protons, 50 electrons
120 neutrons, 50 protons, 75 electrons
50 Protons, 50 Electrons, 75 Neutrons
75 electrons, 50 Protons, 50 Neutrons
18
Which of the following of Dalton's theory has to be revised?
atoms are tiny indivisible particles
atoms of any one elemnt are different from those of another element
compounds are made by combining atoms
atoms of different elements can combine in whole number ratios
19
What does the number 16 in the name oxygen-16 represent?
the sum of the protons and electrons
mass number
atomic number
twice the number of protons
20
Which of the following was one of Dalton's improvements over Democritus's ideas?
matter consists of tiny particles called atoms
Atoms are indestructible
Atoms retain their identity in a chemical reaction
Atoms are indivisible
21
What is the mass-form for the isotope with 38 protons and 50 neutrons?
Stronium-88
Tin-50
Stronium-50
Tin-88
22
If O has three isotopes: O-16, O-17, O-18, and its atomic mass is 15.99, which is more abundant
O-16
O-17
Help us all
O-18
23
The smallest particle of an element that retains the properties of that element
isotopes
atom
electron
elements

Chemistry Chapter 4 Flashcards | StudBud