What is the biggest difference between the discoveries of J.J. Thomson and Ernest Rutherford?

Ernest Rutherford discovered the nucleus and that electrons surrounded it.

Not shiny, poor conductors , cannot be shaped into wires or shapes, brittle

Groups on the periodic table have what in common?

Same number of electrons in the outer shell

How do we calculate the amount of neutrons in an atom?

Subtract the atomic number from the atomic mass

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Atoms & The Periodic Table-2024

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Questions 26

Answers

1
What are metals?
Shiny, good conductors, easily shaped into wires, high density,
Gas at room temperature, rarely combines with other elements
not as shiny, conductors of heat and electricity, can be made into wires
Not shiny, poor conductors , cannot be shaped into wires or shapes, brittle
2
Which subatomic particle has a positive charge?
Electron
Neutron
Proton
Atom
3
What does 35.45 represent?
Chemical Symbol
Atomic Mass
Element Name
Atomic Number
4
What are metalloids?
Not shiny, poor conductors , cannot be shaped into wires or shapes, brittle
Shiny, good conductors, easily shaped into wires, high density,
Gas at room temperature, rarely combines with other elements
not as shiny, conductors of heat and electricity, can be made into wires
5
If an element has 15 protons and 15 neutrons, what is the atomic mass?
30
45
20
15
6
What is the small building block of all matter called?
Atom
Substance
Element
Mixture
7
Which parts of an atom are found in the nucleus?
Neutrons only
Electrons and neutrons
Electrons and protons
Neutrons and protons
8
Which subatomic particle identifies the element?
Atom
Neutron
Proton
Electron
9
What is the biggest difference between the discoveries of J.J. Thomson and Ernest Rutherford?
Ernest Rutherford discovered the plum-pudding model.
J.J. Thomson discovered the planetary model.
J.J. Thomson discovered the nucleus and that electrons surrounded it.
Ernest Rutherford discovered the nucleus and that electrons surrounded it.
10
What was J.J. Thomson’s atomic model known as?
The plum-pudding model
The electron shell model
The planetary model
The electron cloud model
11
What are nonmetals?
Not shiny, poor conductors , cannot be shaped into wires or shapes, brittle
not as shiny, conductors of heat and electricity, can be made into wires
Gas at room temperature, rarely combines with other elements
Shiny, good conductors, easily shaped into wires, high density,
12
Groups on the periodic table have what in common?
Same number of electron shells
Same number of electrons in the outer shell
Same atomic mass
Same atomic number
13
Which subatomic particle is located outside the nucleus?
Proton
Atom
Neutron
Electron
14
What does Chlorine represent?
Atomic Number
Atomic Mass
Element Name
Chemical Symbol
15
What does the 17 represent?
Chemical Symbol
Element Name
Atomic Number
Atomic Mass
16
Periods on the periodic table have what in common?
Same number of electron shells
Same atomic mass
Same number of electrons in the outer shell
Same atomic number
17
Which subatomic particle has a negative charge?
Atom
Electron
Proton
Neutron
18
The atomic mass of an element tells us the number of what?
Electron Shells
Protons and neutrons
Protons and electrons
Electrons
19
Which subatomic particle has a neutral charge?
Electron
Proton
Atom
Neutron
20
Rows on the periodic table are called what?
Periods
Compounds
Columns
Groups
21
Columns on the periodic table are called what?
Compounds
Groups
Rows
Periods
22
If an element has an atomic mass of 9 and it has 5 neutrons, how many protons does it have?
14
9
4
5
23
How do we calculate the amount of neutrons in an atom?
Add together the protons and electrons
Add the atomic number and the atomic mass
Count the number of electrons in the electron shells
Subtract the atomic number from the atomic mass
24
The atomic number of an element tells us the number of what?
Electron Shells
Protons and neutrons
Electrons
Protons and electrons
25
If an element has an atomic mass of 27 and the atomic number is 13, how many neutrons does it have?
13
40
14
27
26
What does the Cl represent?
Atomic Mass
Atomic Number
Element Name
Chemical Symbol

Atoms & The Periodic Table-2024 Flashcards | StudBud