Material World

Question 1

what makes a stronger electrolyte

Answer 1

more dissociation of the ions

Question 2

Formula for Electrolytic Dissociation

Answer 2

NaCl(s)—->Na+(aq)+Cl-(aq)

Question 3

do you know something is an acid in an equation

Answer 3

The chemical formula begins an H ends with a nonmetal

Question 4

how do you know when the equation has a base in it

Answer 4

The chemical formula ends with OH and begins with a metal

Question 5

what is a covalent bond

Answer 5

A bond resulting from a sharing of electrons

Question 6

how do you show a covalent bond

Answer 6

Lewis notation with the circles

Question 7

how do I know when a molecule is a covalent bond

Answer 7

both atoms are nonmetal

Question 8

define an ionic bond

Answer 8

A bond resulting from the gain or loss of electrons

Question 9

how do you draw an ionic bond

Answer 9

with Lewis notation and arrows

Question 10

how do you know when a molecule is an ionic bond

Answer 10

when the molecule has one nonmetal atoms and one metal atom

Question 11

what does it mean when something is exothermic

Answer 11

you get heat from it

Question 12

what does it mean when something is endothermic

Answer 12

it takes heat away

Question 13

in the chemical formula the energy or heat is on the right side what does that mean

Answer 13

The equation is exothermic

Question 14

what does it mean when the energy or heat is on the left side of the equation

Answer 14

The chemical formula is endothermic

Question 15

what is radioactivity

Answer 15

the emission of particles or energy by the nucleus of the atom following nuclear transformations

Question 16

what are examples of technology that use radioactivity

Answer 16

cancer treatments

Question 17

what is work related to

Answer 17

how much force is required to move an object over a certain distance

Question 18

what is mass

Answer 18

mass is our weight on earth

Question 19

what is weight

Answer 19

Weight is dependent on the force or pull of gravity

Question 20

is potential energy

Answer 20

change in vertical displacement. 100% of the energy is potential before an object drops

Question 21

what is kinetic Energy

Answer 21

movement of objects horizontally, usually all the energy is kinetic

Question 22

what is the electrical charge of a neutron

Answer 22

neutral

Question 23

what is the equation for carbonate

Answer 23

CO3 (-2 is the charge)

Question 24

what is the equation for hydroxide

Answer 24

OH (-1 is the charge)

Question 25

what is the equation for nitrate

Answer 25

NO3 (-1 is the charge)

Question 26

what is the equation for ammonium

Answer 26

NH4 (+1 is the charge)

Question 27

what is the equation for phosphate

Answer 27

PO4 (-3 is the charge)

Question 28

what is the equation for sulfate

Answer 28

SO4 (-2 is the charge)

Question 29

is electrolytic dissociation

Answer 29

compounds will separate into two separate charges when dissolved in water. Ion means "to go" in Greek

Question 30

how do you name an ionic bond

Answer 30

first name the metal and then you name the nonmetal with the suffix "ide"

Question 31

what are the names for NaCl and Li2S

Answer 31

Sodium Chloride | Lithium Sulfide

Question 32

how do you name an ionic compound with a transition metal

Answer 32

same way you would with an ionic compound but you use a Roman numeral after the metal

Question 33

what are the names of TiCl4 and PbBr2

Answer 33

Titanium(IV) Chloride | Lead(II) Bromide

Question 34

how do you write the name of a covalent compound

Answer 34

write the prefix before the first nonmetal, then the prefix of the second nonmetal, and then add the suffix at the end of the second nonmetal

Question 35

How do you right CO and N2O3

Answer 35

Carbon Monoxide Dinitrogen trioxide (IF THE FIRST ELEMENT IS MONO YOU DONT WRITE THE PREFIX)

Question 36

what are the prefixes for numbers one through six

Answer 36

``` 1-mono 2-Di 3-tri 4-tetra 5-penta 6-hexa ```

Question 37

how do you write the name into a formula

Answer 37

find the charges and then cross them over

Question 38

what is Avogadro's number

Answer 38

6.02x10^23

Question 39

what is the atomic number of an element related to

Answer 39

Number of protons that element has

Question 40

what is an isotope

Answer 40

Adams of the same element whose nuclei have different numbers of neutrons and therefore a different atomic mass

Question 41

what is a radioactive isotope

Answer 41

an isotope who's atomic nucleus is unstable

Question 42

what is relative atomic mass

Answer 42

The average mass of the atoms in an element

Question 43

what do all periods have in common

Answer 43

same number of shells

Question 44

what's in common about the groups

Answer 44

same number of valence electrons

Question 45

what is the periodicity the atomic radius of atoms

Answer 45

The biggest is in the bottom left corner and as it goes out they get smaller

Question 46

what family is the most reactive

Answer 46

halogen

Question 47

what is current intensity

Answer 47

The number of charges that flows past a given point

Question 48

what is potential difference

Answer 48

The amount of energy transferred between two points in an electrical circuit

Question 49

what is the left-hand rule for a solenoid

Answer 49

The fingers curled around the coil in the direction of the current and the thumb points in the direction of the magnetic field lines (to north)

Question 50

what can affect the strength of an electromagnet

Answer 50

material of the wire the current intensity and the number of coils

Question 51

what can you use a solenoid for

Answer 51

for transforming electrical energy into magnetic energy