Question

What is the basic building block of all matter?

Answer 1

any ideas? by "basic building block" they mean something that makes up all matter, and which itself cannot be divided

Answer 2

[technically it can be divided but that was a very recent discovery]

Answer 3

atioms

Answer 4

atoms

Answer 5

good!

Answer 6

List the three types of particles that make up an atom. Describe each particle based on its charge and location in the atom.

Answer 7

any thoughts so far? [kind of just have to look up/know this one ^^"]

Answer 8

electron neutron proton

Answer 9

electron has a neg charge
neutron has no charge
proton has a positive charge

Answer 10

good, what about their locations?

Answer 11

The protons and neutrons are located in the atomic nucleus; the electrons are around the nucleus, arranged in shells.

Answer 12

good, that's all you'd really need for this q

Answer 13

How does an ion differ from an atom?

Answer 14

Atoms are the smallest unit of matter that can't be broken down chemically. Ions are atoms (or molecules) that have a net positive or negative charge.

Answer 15

good

Answer 16

Compare the number of protons with the number of electrons in a positive ion

Answer 17

In a neutral atom, the number of protons equals the number of electrons. However, an ion will have more or less electrons depending on the element. In a neutral atom, the number of protons equals the number of electrons. However, an ion will have more or less electrons depending on the element.

Answer 18

you're getting on the right track but they are asking about a positive ion, would the # of protons be higher or lower than the # of electrons?

Answer 19

higher

Answer 20

good, so they'd want an answer along the lines of "in a positive ion the # of protons is higher than the # of electrons"

Answer 21

Dang I was making it too complicated :O

Answer 22

Ernest Rutherford performed the "gold foil experiment," in which he bombarded a thin sheet of gold foil with positively charged particles. How was the atomic model he proposed different from the previous model of the atom? Write one or two sentences to describe the evidence on which he based his conclusions.

Answer 23

before Rutherford's experiment the predominant model was JJ Thompson's plum pudding model which stated that the charges were distributed evenly like a pudding embedded with plums. In Rutherford's experiments he fired alpha particles at an atom, and found that most of the particles passed through but a few rebounded, indicating there must be some dense center deflecting the particles. he concluded that the atom must have a dense center with mostly empty space around it, a contradiction of the earlier model

Answer 24

hold on let me reword that =)

Answer 25

How do the atomic numbers of different isotopes of an element compare

Answer 26

as a hint - isotopes have different # of neutrons and the same # of protons as each other

mass # is a sum of protons and neutrons

Answer 27

oh wait they're asking about atomic number not mass #

Answer 28

atomic number = # of protons, would the atomic # be the same or different for isotopes?

Answer 29

diff

Answer 30

as a reminder - isotopes have different # of neutrons and the same # of protons as each other

so the atomic # would be the same

Answer 31

so atomic number = # of protons same as isotopes?

Answer 32

yes, the atomic # would be the same among isotopes

Answer 33

How do the atomic mass numbers of different isotopes of an element compare

Answer 34

well, judging by what we said earlier, if mass number is the sum of # of protons and # of electrons would isotopes have same or different mass #?

Answer 35

sum of protons + neutrons whoops not electrons

Answer 36

same

Answer 37

as a reminder isotopes have different numbers of neutrons

Answer 38

mass number = sum of neutrons + protons

so the mass number must be different among isotopes

Answer 39

How can you determine the number of protons in an atom by using the periodic table

Answer 40

well, from what we said earlier, # of protons = atomic # so you would just look at the element on the ptable, then look at its atomic #

Answer 41

How many protons, neutrons, and electrons does a neutral atom of copper-65 have

Answer 42

29 protons and 36 neutrons

Answer 43

good but what about electrons?

Answer 44

29

Answer 45

awesome, so that's it

Answer 46

Atoms can bond together in several different ways. Name three types of chemical bonding. Explain what happens to electrons in each type of bonding

Answer 47

I'm guessing they're looking for ionic, covalent, and metallic, just need to look these up + write their descriptions of how the electrons behave

Answer 48

Okay, im gonna sleep now, can we continue tomorrow if possible

Answer 49

ok, sleep well, I'm usually ok Friday afternoons unless my boyfriend wants to plan something

will let you know either way

Answer 50

Sure thing, do you want me to close this post and just repost the question tomorrow or keep this open

Answer 51

I think closing + re-posting would be helpful since this is kind of long already

Answer 52

OKay have a goodnight