PT.1 NOTES

Question 1

what are atoms?

Answer 1

• The smallest unit of matter.
• It cannot break down chemically.
• They consist of a nucleus surrounded by electrons

Question 2

what are molecules?

Answer 2

• Have a neutral electric charge.
• A group of two or more atoms that are chemically bonded together.
• Made up of the same elements but not all the time.

Question 3

what is compound?

Answer 3

• Made of two or more atoms chemically bonded together
• Compounds are always made up of different elements

Question 4

Covalent compounds are also called Molecular compounds what are these?

Answer 4

Covalent compounds are made of pure non-metals
The compounds are made up of molecules, which are groups of atoms.

Question 5

what are Ions?

Answer 5

• Charge particles
• are atoms or molecules that have gained or lost electrons, giving them a net electrical charge.

Question 6

What are valence electrons?

Answer 6

• They are located in the valence shell
• They participate in electric bonding
• Atoms can share valence electrons to form covalent bonds

Question 7

Law of Octet

Answer 7

• Particles attain stability when it has 8 valence of electrons
• atoms will gain, lose, or share electrons in chemical reactions to achieve a full valence shell of eight electrons.

Question 8

Having electrons of 0 is more stable than having 1-7 valence electrons

Answer 8

Law of 0

Question 8

How does an atom become a molecule?

Answer 8

through chemical bonding

Question 8

How does an atom become an ion?

Answer 8

• through ionic bonding
• release of electrons

Question 9

what is a physical property?

Answer 9

• can be observed or measured without changing the substance’s chemical identity
• Physical, outer appearance

Question 10

what is a chemical property? give examples

Answer 10

• describe how a substance interacts with other substances and undergoes chemical changes or reactions.

combustibility
stability
reactivity
relative activity
ionization
toxicity

Question 11

bakit multiple oxidation ng ibang elements?

Question 11

what is intensive property? give an example.

Answer 11

does not depend on the amount of matter in a substance

ex.
boiling point
freezing point
melting point
density
buoyancy
ductility
malleability
elasticity
viscosity
color
electrical conductivity
solubility

Question 12

2 types of physical property

Answer 12

intensive and extensive