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Biology > Friday 27th Aug/General knowledge > Flashcards

Friday 27th Aug/General knowledge Flashcards

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1
Q

What charge of neutron?

A

negative -

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2
Q

What scientific tool is used to examine atoms?

A

a scanning tunnelling microscope (STM)

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3
Q

How is energy lost through radioactive decay?

A

Protons

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4
Q

What particles make up a pure substance?

A

Elements and compounds

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5
Q

Why cant a pure substance be separated by physical methods such as filtration or evaporation?

A

because it is made up of the same thing

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6
Q

An element is made up of a single type of atom. It cannot be broken down chemically

A

True

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7
Q

What are the three different types of elements?

A

Metal
Non-metal
Metalloid

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8
Q

What are the two things that a compound can be?

A

Molecule

Lattice

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9
Q

What is a molecule made up of?

A

atoms

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10
Q

What is lattice made up of?

A

Ions

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11
Q

What is an ion?

A

an atom that does not have the same number of protons and electrons.

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12
Q

The particles in a mixture are combined physically?

A

True

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13
Q

What is decanting?

A

The separation of heavy liquids from lighter liquids.

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14
Q

What is filtration?

A

The separation of bigger particles from smaller particles

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15
Q

What is matter?

A

Any material that has a mass and takes up space with its volume.

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16
Q

What is a pure substance?

A

A material that is made up of a single type of particle. It cannot be separated by physical methods.

17
Q

What is a mixture?

A

A material that contains many types of particles that are combined physically. The atoms are not bonded together. It can be separated by physical methods

18
Q

What is an element?

A

A substance made up of a single type of atom. It cannot be broken down chemically.

Can be a metal, non-metal or metalloid.

19
Q

What is a compound?

A

A substance that has more than a single type of atom that are chemically bonded together. It can be separated chemically.

Can be a molecule made of non-metal atoms or lattice a grid like structure made of ions.

Biology (5 decks)

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