Which of the following is not one of the five principles of Dalton’s theory?

All atoms have similar physical and chemical properties

According to the law of definite proportions, any two samples of KCl will have

elements in proportion by the same mass

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Chapter 3 the atom

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Questions 15

Answers

1
An atom of potassium has 19 protons and 20 neutrons. Its mass number is
1
39
19
20
2
Which of the following is not one of the five principles of Dalton’s theory?
All matter is made of indivisible, indestructible atoms
Atoms of different elements combine in simple, whole-number ratios
Chemical reactions are made combination, separation, or rearrangement.
All atoms have similar physical and chemical properties
3
How many moles of sodium hydroxide, NaOH, are in a 35.65 g sample of NaOH? (The molar mass of NaOH is 40.01 g/mol.)
1.122 mol
1426 mol
0.8910 mol
5.366 x 102 3 mol
4
The molecular mass of CO₂ is 44.01 u. What is the mass of 2.0 mol of CO₂?
44.01 g
88.02 g
88.02 u
44.01 u
5
According to Rutherford the nucleus of the atom is
Is the largest part of the atom
Has a low density
Postively charged
Negatively charged
6
Which of the following is not equal to 1.00 mol of carbon-12?
6.02× 102 3 carbon atoms
6.0 g of carbon
none of the abolve
12.0 g of carbon
7
The units of molar mass are
g/mol
mol/g
amu/g
amu/mol
8
Neutral atoms contain equal numbers of
Protons and Electrons
Protons, Neutrons, and Electrons
Neutrons and Protons
electrons and neutrons
9
The atomic symbol for beryllium, ⁹ ₄ Be, indicates that the
atomic number is 9-4
atomic number is 4
atomic number is 9
mass number is 4
10
According to the law of definite proportions, any two samples of KCl will have
elements in proportion by the same mass
same mass
slightly different structures but the same mass
different densitites
11
The least massive particle in an atom is the
none of the above
electron
proton
neutron
12
Compared with a mole of lead atoms, a mole of iron atoms
has the same number of atoms
less atoms than lead
can not be determined because iron is magnetic
more atoms than lead
13
The ancient Greek natural philosopher that first proposed the notion of the atom was
Plato
Aristoltle
Democritus
Socrates
14
The most massive particle in an atom is the
neutron
Proton
electron
none of the above
15
Protons are bound together by
strong nuclear forces
magnetic forces
gravitational forces
electrical forces

Chapter 3 the atom Flashcards | StudBud

Chapter 3 the atom

15 termsStudBud Administration129 plays

Imported from external platform

Flashcards15 cardsFPractice quizPHost liveL

Questions 15

Answers

1
An atom of potassium has 19 protons and 20 neutrons. Its mass number is
1
39
19
20
2
Which of the following is not one of the five principles of Dalton’s theory?
All matter is made of indivisible, indestructible atoms
Atoms of different elements combine in simple, whole-number ratios
Chemical reactions are made combination, separation, or rearrangement.
All atoms have similar physical and chemical properties
3
How many moles of sodium hydroxide, NaOH, are in a 35.65 g sample of NaOH? (The molar mass of NaOH is 40.01 g/mol.)
1.122 mol
1426 mol
0.8910 mol
5.366 x 102 3 mol
4
The molecular mass of CO₂ is 44.01 u. What is the mass of 2.0 mol of CO₂?
44.01 g
88.02 g
88.02 u
44.01 u
5
According to Rutherford the nucleus of the atom is
Is the largest part of the atom
Has a low density
Postively charged
Negatively charged
6
Which of the following is not equal to 1.00 mol of carbon-12?
6.02× 102 3 carbon atoms
6.0 g of carbon
none of the abolve
12.0 g of carbon
7
The units of molar mass are
g/mol
mol/g
amu/g
amu/mol
8
Neutral atoms contain equal numbers of
Protons and Electrons
Protons, Neutrons, and Electrons
Neutrons and Protons
electrons and neutrons
9
The atomic symbol for beryllium, ⁹ ₄ Be, indicates that the
atomic number is 9-4
atomic number is 4
atomic number is 9
mass number is 4
10
According to the law of definite proportions, any two samples of KCl will have
elements in proportion by the same mass
same mass
slightly different structures but the same mass
different densitites
11
The least massive particle in an atom is the
none of the above
electron
proton
neutron
12
Compared with a mole of lead atoms, a mole of iron atoms
has the same number of atoms
less atoms than lead
can not be determined because iron is magnetic
more atoms than lead
13
The ancient Greek natural philosopher that first proposed the notion of the atom was
Plato
Aristoltle
Democritus
Socrates
14
The most massive particle in an atom is the
neutron
Proton
electron
none of the above
15
Protons are bound together by
strong nuclear forces
magnetic forces
gravitational forces
electrical forces