Chapter 4/Chem
What did Rutherford determine about the structure of the atom from his gold-foil experiment?
An atom contains a small packed nucleus that is positively charged.
On a dry day your hair flies apart when you brush it. How would you explain it?
Electrical charges that are alike build up on the brush and in your hair. Your hair flies away from the brush.
Has a -1 charge
Electron
Has a 1- charge
Electron
Has the smallest mass
Electron
Is attracted to a proton
Electron
Is found outside the nucleus
Electron
Are attracted to protons
Electrons
What is a macromineral
Element essential to health, which is present in the body in amounts from 5 to 1000g
What do you know about mass number - atomic number?
Equals neutrons
What do you know about the mass number?
Equals protons + neutrons
What do you know about the atomic number
Equals the number of protons
A neutron has twice the mass of a proton
False
Electrons and neutrons have opposite charges
False
Neutrons repel each other
False
Noble gases are highly reactive
False
A proton is attracted to a neutron
False, a proton is attracted to an electron
The nucleus occupies a large volume in an atom
False, most of the volume of the atom is outside the nucleus
The nucleus occupies a large volume in an atom - true or false?
False. Most of the volume of the atom is outside the nucleus.
An electron is attracted to a neutron
False; an electron is attracted to a neutron
Why is the atomic number of Sr on the periodic table not a whole number?
It's a weighted average of the 4 Sr isotopes
The number of neutrons in a nucleus equals
Mass number - number of protons
Classified as a noble gas
Ne
Has a mass about the same as a proton
Neitron
Has a mass about the same size as a proton
Neutron
Is electrically neutral
Neutron
Mass number - atomic number
Neutrons
An element that is gas at room temperature
Nonmetal
Atomic number =
Number of protons
When clothes cling together when removed from the dryer, what charge do they have?
Opposite, unlike charges
Has a +1 charge
Proton
Are found in the nucleus
Proton and neutron
Is found in the nucleus
Proton and neutron
Mass number
Protons and neutrons
What is the role of sulfur in the body
Sulfur is a component of proteins, liver, vitamin B, and insulin
Mass number + the atomic number
Tells you nothing
What do you know about mass number + atomic number?
Tells you nothing
# of protons and electrons are always the same
True
A proton and electron have opposite charges
True
A proton is attracted to an electron
True
A proton is heavier than an electron
True
Alkali metals are good conductors of heat and electricity
True
Alkaline earth metals are not as reactive as alkali metals
True
Electrons repel each other
True
Halogens are highly reactive
True
Mass number equals protons plus neutrons
True
The nucleus contains all the protons and neutrons of an atom
True
The number of protons in an atom is equal to the number of electron in an atom
True
1a
Where are alkali metals located
2a
Where are alkaline earth metals located
8a
Where can I find noble gases?
7a
Where can I find the halogens
