LO1 Flashcards

1
Q

What is the basic structure of an atom composed of?

A

Subatomic particles: protons, neutrons, and electrons

The nucleus contains protons and neutrons, while electrons are found in shells surrounding the nucleus.

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2
Q

What is the atomic number of an element?

A

The number of protons in an atom of an element

It determines the identity of the element and is equal to the number of electrons in a neutral atom.

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3
Q

What does the atomic mass number represent?

A

The total number of protons and neutrons in an atom

It is also known as the nucleon number.

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4
Q

How many electrons can the first shell hold?

A

2 electrons

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5
Q

What is the maximum number of electrons in the second shell?

A

8 electrons

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6
Q

What are isotopes?

A

Atoms of the same element with the same number of protons but different numbers of neutrons

Example: Carbon has three isotopes: 12C, 13C, and 14C.

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7
Q

Define nuclear notation.

A

The use of A Z X where A is the nucleon number, Z is the proton number, and X is the element symbol

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8
Q

What is the role of the strong nuclear force?

A

keeping the nuclei stable

This force is short-range and acts between nucleons.

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9
Q

What is the weak nuclear force responsible for?

A

The radioactive decay of atoms

An example of this is beta decay.

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10
Q

What does the Periodic Table represent?

A

An organization of elements based on atomic structure and increasing atomic number

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11
Q

What determines the group number of an element in the Periodic Table?

A

The number of outer shell electrons

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12
Q

What is ionic bonding?

A

Electrostatic attraction between positive and negative ions
metal and non metal
Transferring electrons
achieves more stable formation
dot and cross

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13
Q

What is a cation?

A

A positively charged ion formed when a metal loses a valence electron

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14
Q

What is a covalent bond?

(shape and what do they do with the electrons)

A

The strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms
sharing the atoms
dot and cross diagrams within the circle where shells overlap

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15
Q

What is a dative covalent bond?

A

A bond where one atom provides both electrons in the shared pair

Example: Ammonium ion (NH4+).

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16
Q

What happens during oxidation in terms of ionic equations?

A

Anions lose electrons to form neutral atoms or molecules

17
Q

What is the trend in atomic radius across Periods 2 and 3?

A

The atomic radius decreases from left to right across a period

18
Q

What is the trend in atomic radius down a group?

A

The atomic radius increases from top to bottom within a group

19
Q

What is the relative charge of an electron?

20
Q

What is the relative mass of a proton?

21
Q

What is a balanced ionic half equation?

A

An equation showing the charge balance of ions during electrolysis where both sides of the equation are equal

22
Q

What is the maximum number of electrons in the third shell?

A

18 electrons

23
Q

What are the groups in the Periodic Table characterized by?

A

The same number of outer electrons and similar chemical properties

24
Q

What is the weighted mean mass of an atom compared to Carbon-12 called?

A

Atomic mass

25
Q

What is the significance of the atomic number?

A

It defines the type of atom and its position in the Periodic Table
number of protons and electrons which is the same

26
Q

What is a polar covalent bond?

A

A bond where electrons are shared unequally between atoms due to differences in electronegativity

27
Q

What charge is a cation

28
Q

What charge is an Anion

29
Q

what is a cation

A

a positively charged ion, that would be attracted to the cathode in electrolysis.

30
Q

what charge is a cathode

31
Q

what is an Anion

A

a negatively charged ion, that would be attracted to the anode in electrolysis.

32
Q

what charge is an Anode