Periodic Table And Atoms Flashcards

1
Q

How are elements in the periodic table arranged?

A

Elements in the periodic table are arranged in order of increasing atomic number.

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2
Q

What can the periodic table be used for?

A

The periodic table can be used to determine whether an element is a metal or non-metal.

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3
Q

What are groups in the periodic table?

A

Groups are columns in the periodic table containing elements with the same number of outer electrons, indicated by the group number.

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4
Q

Elements in the same group….

A

Elements in the same group share the same valency and have similar chemical properties because they have the same number of electrons in their outer energy levels.

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5
Q

The electron arrangement of what elements can be written.

A

The electron arrangement of the first 20 elements can be written.

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6
Q

What does an atom contain?

A

An atom has a nucleus, containing protons and neutrons, and electrons that orbit the nucleus.

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7
Q

What are the charges of different particles?

A

Protons have a charge of one-positive, neutrons are neutral and electrons have a charge of one-negative.

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8
Q

What are the masses of different particles?

A

Protons and neutrons gave an approximate mass of one atomic mass unit and electrons, in comparison, have virtually no mass.

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9
Q

What is the atomic number?

A

The number of protons in an atom is given by the atomic number.

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10
Q

What is in a neutral atom?

A

In a neutral atom, the number of electrons is equal to the number of protons.

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11
Q

What is the mass number equal to?

A

The mass number of an atom is equal to the number of protons added to the number of neutrons.

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12
Q

What are isotopes?

A

Isotopes are defined as atoms with the same atomic number but different mass numbers, or as atoms with the same number of protons but different numbers of neutrons.

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13
Q

What is nuclide notation?

A

Nuclide notation is used to show the atomic number , and mass number of atoms from which number of protons, electrons and neutrons can be determined.

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14
Q

How many isotopes do most elements have?

A

Most elements have two or more isotopes.

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15
Q

How can the average/relative atomic mass be calculated?

A

The average atomic mass had been calculated for each element using the mass and proportion of each isotope present. These values are known as relative atomic mass.

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