1 - Elements And The Periodic Table Flashcards

1
Q

What does the total mass number of an atom mean?

A

-how many things are inside the nucleus (protons and neutrons)

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2
Q

What are the charges and relative masses of protons, neutrons and electrons?

A

Proton mass: 1
Proton charge: +1

Neutron mass: 1
Neutron charge: 0

Electron mass: 1/2000*
Electron charge: -1

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3
Q

What is an element?

A

A substance that is made from only one type of atom

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4
Q

What is the electronic configuration of….. Eg N^14 7

A

2,5

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5
Q

Why are the overall charges of atoms’ 0?

A

-because the number of protons and electrons are the same

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6
Q

What is an ion?

A

-a charged atom

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7
Q

Do metals lose or gain electrons?

Do non-metals lose or gain electrons?

A
  • metals lose electrons and become positive ions

- non-metals gain electrons and become negative ions

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8
Q

What is an ionic bond and where do they happen?

A

It is when an atom gains or loses electrons to form a full outer shell
-happens from a metal to a non metal

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9
Q

What does covalent bonding occur between?

A

Two non-metals

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10
Q

What is covalent bonding?

A

The pairs of electrons shared by atoms

In order to gain stability

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11
Q

What are reactants and products?

A

Reactants are the things reacting together while the products are the things being produced

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12
Q

How did Mendeleev organise the elements?

A

By their relative atomic mass

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13
Q

Why did Mendeleev’s table have gaps?

A

For the elements that were still unknown

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14
Q

What could Mendeleev predict from the gaps?

A

The atom’s properties e.g density

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15
Q

What does the group number mean?

A

How many electrons there are in the outer shell

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16
Q

What does the atomic number mean?

A

The number of protons

17
Q

What is there inside an atom?

A

Protons, neutrons and electrons