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Chemistry > Chap.2 > Flashcards

Chap.2 Flashcards

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1
Q

What is an atom

A

Smallest unit of matter
Only 1 atom
Charge neutrality

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2
Q

What is a molecule

A

A participle that made of multiple atoms, rather same type of atom or different types of atoms

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3
Q

What is a pure substance

A

When molecule or atom represents only one type of atom

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4
Q

What is a compound

A

A substance that is composed of different type of atom

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5
Q

What is an ion

A

An atom or molecule that is not neutrally charged, it rather positive or negative
It happened when number of electron is not longer the same as number of proton in an element, so the neutral stat of this element is disturbed

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6
Q

What is the name of negatively charge atom or molecule

A

Anion. In Korean anion means non

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7
Q

What is the name of positively charge molecule

A

Cation

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8
Q

What is an isotope

A

For the same atom, but different numbers of neutrons

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9
Q

What an atom made of?

A

Nucleus: proton and neutrons

Electron

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10
Q

What are rôles of proton

A

Dertermide atomic number and part of mass number aka molar masse(p plus neutron
Determine which element
An protons of element never change

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11
Q

What are role of neutron

A

Determine isotope
Part of mass numbers -molar mass
Which the same element—same number of proton
With different numbers of electron

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12
Q

What are role of electron

A

It get transferred:ionic bound -ion
Shared: convalent
To formule molecule

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13
Q

What are differences between molecule and compounds

A

Molecule: more than 1 atom,many atoms
Compound: more than 1 type of atoms

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14
Q

What are symbols of atom

A 
A: mol mass
Z:atomic number 
A
Z:  E
For symbol of atom
For periodic table 
Is the opposite 
Z
X
A
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15
Q

How many proton and electrons should have in a non ion

A

It should have the same amount

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16
Q

In an ion how many electrons should have?

A

Depending on how much we gain or lose

17
Q

What are types of chemicals bounds

A

Convalent and ionic

18
Q

What is an ionic bonding

A

A chemical form with cation(metal) and anion(non metal), they are form when electrons get transferred .
Overall charge =0
General rule = cation + anion +ide

19
Q

What is a convalent compound

A

Form between non-metal

There’s no need for balance the charge cuz there is none

20
Q

In a periodic table, where does metal situate

A

Inside of the stairs

21
Q

In a periodic table, where does non.metal situate

A

Outside of stairs

22
Q

What is an atomic number

A

Number of P =number of e in an element’s neutral state,

Is the integer number upper in periodic table

23
Q

What is mol mass or mass number

A

Is the number of p plus neutron

Is the number down of the periodic table

24
Q

What are common names and what are their formulas

A

Water H2O
Ammonia NH3
Hydrogen peroxide H2O2

25
Q

What are the important families ?

A

Alkali metal
Alkaline earth metal
Halogen
Noble gas

26
Q

Where do important families are in periodic table , what are theirs charges

A

Alkali .alkaline earth……halogen.noble gas

1A(+1)……2A(+2) …………7A(-1)……….8A(none)

27
Q

What is charge for6A

A

-2

28
Q

What is charge for5A

A

-3

29
Q

What is charge for Ag

A

+1

30
Q

Charge for Zn,Cd

A

+2

31
Q

Charge for Al,Ga

A

+3

32
Q

Meaning of binary ionic compounds

A

2elems only+ def of ionic compound

33
Q

How to name an binary’s ionic compound with constant charge of cation

A

Cation by elem.name+Anion by el.name+ide

34
Q

How to name a binary ionic compound with not constant charge of cation

A

Cation by el.name+( Roman numbers) +anion by elem.name +ide

35
Q

What is the difference between binary ionic compound with cst charge and with the one withnon cst ?

A

The cation of cst charge is fixed and only has ONE single and need to reminber by memory
Another can have multiple cation with different charges

36
Q

What is a polyatomic ionic compound

A

> 2atoms + def of ionic compound

37
Q

What is a polytomic ions?

A

More than 2atoms+def of ions

Chemistry (4 decks)

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