Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BIO > Lecture 4 Ions And Molecules > Flashcards

Lecture 4 Ions And Molecules Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What’s is group 1A (periodic table) called?

A

Alkali metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Alkali Metals

A

Group 1A

They are reactive

Called alkali because they make positively charged ions that tend to from basic (alkaline) aqueous solutions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are rows on the periodic table called?

A

Periods

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are columns on the periodic table called?

A

Groups

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What will a period tell you?

A

How many shells the element has

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What will a group tell you?

A

The number of valence electrons in the outer shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How many bonds does Carbon make?

A

4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is Group 2A called?

A

Alkaline Earth metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How reactive are Alkaline Earth metals ?

A

They are less reactive then alkali metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Group 7A(17) called?

A

Halogens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How reactive are Halogens?

A

Extremely reactive
Especially Cl and F
They only need one electron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is Group 8A (18) called?

A

Noble gases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How reactive are Noble gases?

A

Not reactive at all

They have a full shell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What elements make up 96% of the body?

A

Oxygen, nitrogen, carbon, hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the 7 elements that are important in the body in small amounts?

A

Calcium, Phosphorus, sulfur, sodium, magnesium, chlorine, potassium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Are the 7 elements toxic?

A

The body is really good at regulating these elements, it’s hard for them to be toxic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are Trace elements? Are they toxic?

A

Elements that are needed in really small amounts

Too much can be toxic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Elements important for bones

A

Calcium and Phosphorus

19
Q

Iodine is vital for?

A

A functioning thyroid gland

Controls metabolism

20
Q

What was added to salt that eliminated goiter?

A

Iodine

21
Q

What does Fluorine do and what form do we need it in?

A

Hardens teeth and bones
We need it in the form fluoride (taken an extra electron)

22
Q

What was added to water that decreased cavities in teeth?

A

Fluoride

23
Q

What is iron needed for ? And what was iron added to?

A

Needed for hemoglobin in blood to bind oxygen

Added to cereal

24
Q

What does Sodium and Potassium do for the body?

A

As ions they are required for proper functioning of the nervous system cells and muscle cells

25
Q

An element that is not biologically important?

A

Mercury

26
Q

Mercury in its toxic form

A

Methyl-mercury

27
Q

Non toxic form of mercury?

A

Ethyl-mercury

28
Q

Ions

A

Atoms or molecule that has gained or lost valence electrons

Carry a + or - charge

29
Q

Anions

A

Have gained an electron and carry a negative charge

30
Q

Cations

A

Have lost an electron and carry a positive charge

31
Q

If Phosphorus has 15 electrons, how many electrons does P^-3 have?

What type of ion is this?

A

18

Anion

32
Q

If Al has 13 electrons, how many electrons does Al^3+ have?

What type of ion is this?

A

10

Cation

33
Q

Ionic bond

A

One atom gives an electron to another atom

Happens between metals and nonmetals

34
Q

Difference between ionic and covalent ?

A

In ionic bonds electrons are given
In Covalent bonds electrons are shared

35
Q

The cation is named

A

_______ ion

36
Q

The anion ion is named

A

______ide

37
Q

The molecule’s name starts with what?

A

The cation then the anion

38
Q

Covalent bond

A

Is made when atoms share electrons

Non metals with non metals

39
Q

Polyatomic ion

A

Consist of more than one atom

It is a charged molecule

40
Q

Two polyatomic ions we need to know?

A

Hydroxide (OH-)
Phosphate (PO4^-3)

41
Q

Polar molecules

A

One end of the molecule has more negative charge then the other

42
Q

. O
H H

Is this a polar molecule and which side is positive and negative?

A

Top of O is negative
Bottom of H is positive

43
Q

Elements in the same _______ often have similar _______ because they need the same number of electrons to be stable.

A

Group, reactivity

BIO (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions