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Year 10 GCSE AQA Combined Chemistry > C1 Atomic Structure > Flashcards

C1 Atomic Structure Flashcards

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1
Q

What is the definition of an element?

A

An element is a pure substance that is made up of only one type of atom

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2
Q

True or False: Compounds are made up of two or more different elements chemically bonded together.

A

True

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3
Q

What is the smallest unit of an element that retains the properties of that element?

A

An atom

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4
Q

What are the three main subatomic particles?

A

Protons, neutrons, and electrons

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5
Q

What charge does a proton have?

A

Positive charge

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6
Q

Which subatomic particle has a negligible mass and a negative charge?

A

Electron

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7
Q

What is the main characteristic of noble gases?

A

They are inert and do not readily react with other elements.

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8
Q

True or False: Alkali metals are highly reactive and are found in Group 1 of the periodic table.

A

True

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9
Q

What is the difference between a mixture and a compound?

A

A mixture is a physical combination of substances that can be separated, while a compound is a chemical combination of substances that cannot be separated by physical means.

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10
Q

What is the atomic number of carbon?

A

6

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11
Q

Fill in the blank: The mass number of an atom is the sum of its ______ and ______.

A

protons; neutrons

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12
Q

Which particle determines the identity of an element?

A

Proton

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13
Q

What are isotopes?

A

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

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14
Q

Multiple Choice: Which of the following elements is a halogen? A) Fluorine B) Helium C) Iron

A

A) Fluorine

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15
Q

What is the significance of the atomic mass unit (amu)?

A

It is a unit of mass used to express atomic and molecular weights.

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16
Q

True or False: The nucleus of an atom contains protons and electrons.

A

False

17
Q

What is the maximum number of electrons that can occupy the first energy level of an atom?

A

2

18
Q

Fill in the blank: The outermost electrons of an atom are called ______.

A

valence electrons

19
Q

What is the main reason for the reactivity of alkali metals?

A

They have one valence electron that they readily lose to form positive ions.

20
Q

What is the role of electrons in chemical bonding?

A

Electrons are involved in forming bonds between atoms by being shared or transferred.

21
Q

Multiple Choice: Which of the following is a diatomic molecule? A) O2 B) H2O C) NaCl

A

A) O2

22
Q

Fill in the blank: The nucleus of an atom contains ______ and ______.

A

Protons and neutrons

Year 10 GCSE AQA Combined Chemistry (2 decks)

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