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BSC1005 - Chapter 2 Practice Questions and Answers (100% Pass)
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BSC1005 - Chapter 2 Practice Questions and Answers (100% Pass) Matter - Answer️️ -Anything that takes up space and has mass Element - Answer️️ -A substance that cannot be broken down into another substance by ordinary chemical means. Smallest units that can make up matter. - Only 92 na...

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  • August 27, 2024
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  • 2024/2025
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©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

BSC1005 - Chapter 2 Practice Questions and Answers (100% Pass)


Matter - Answer✔️✔️-Anything that takes up space and has mass

Element - Answer✔️✔️-A substance that cannot be broken down into
another substance by ordinary chemical means. Smallest units that can
make up matter.

- Only 92 naturally occurring elements

Four elements make up about 96% of the body weight of most living
organisms - Answer✔️✔️-carbon, hydrogen, oxygen, and nitrogen

Atomic structure - Answer✔️✔️-What an Atom looks like

Atomic theory - Answer✔️✔️-States that elements consist of atoms

Atomic Chemical symbol - Answer✔️✔️-This is the name of the atom or
element

Subatomic elements: What makes up an atom - Answer✔️✔️-Neutrons—no
electrical charge, found in nucleus

Protons—positive charge + , found in nucleus

Electrons—negative charge - , found outside of nucleus

Atomic number - Answer✔️✔️-The number of protons in an atom is the
Atomic Number.



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, ©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

• Because an atom is neutral in charge, the Protons always equal the
Electrons. So you can derive the # of electrons from this number as well.

Atomic Mass Number - Answer✔️✔️-Equal to sum of protons and neutrons.



So P + N = Mass Number

Periodic table - Answer✔️✔️-• Elements' chemical and physical
characteristics recur in a predictable manner

• Atoms are arranged in periods (rows) and groups (columns)

Isotopes - Answer✔️✔️-• Atoms of the same element that differ in the
number of neutrons

• Isotopes have the same number of protons but a different number of
neutrons (different mass numbers)

• Unstable and may decay, emitting radiation

• Radioactive isotope behavior is essentially the same as a stable isotope of
same element

The arrangement of electrons - Answer✔️✔️-• Very important!

• Electrons are constantly moving.

• It is useful to construct models of atoms with energy levels or electron
shells to understand how the atom will behave around other atoms

• Each shell contains a certain number of electrons.

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