Plum pudding and Nuclear Atom
What are electrons?
What are protons and neutrons?
Electrons are subatomic atoms that are negatively charged.
Protons are subatomic atoms that are positively charged.
Neutrons are subatomic atoms that have no charge.
What are isotopes?
What is the atomic number?
What is the mass number?
Isotopes are atoms that have the same amount of protons but different amounts of neutrons.
Atomic number is the amount of protons in an atom.
Mass number is the sum of protons and neutrons.
What are electrolytes? And what are 2 ways that it helps you?
Electrolytes are substances that have a positive or negative charge when dissolved in water.
1) Maintains body chemical reactions.
2) Maintains body fluids inside and outside the cell.
What is a bond?
Its a force or attraction that holds groups of two or more atoms together and makes them function as a unit.
When does an atom become charged?
An atom becomes charged during a reaction. When you dissolve a compound and see a disassociation occur.
Willian Thomson came up with the plum pudding model. Describe this model of an atom.
Electrons were the fruit embedded in a positively charged cloud that is the pudding.
Give the # of protons, neutrons, and electrons for the isotopes 126C, 136C, and 146C. Show work to find neutrons.
12-6= 6 neutrons, 6 protons, and 6 electrons
13-6=7 neutrons, 6 protons, and 6 electrons
14-6=8 neutrons, 6 protons, and 6 electrons.
How does your body get electrolytes?
What do electrolytes do?
Your body gets electrolytes when you eat or drink.
Electrolytes help conduct electrical charges.
What is bond energy?
What is the nucleus?
The nucleus is a dense center that is positively charged, surrounded by protons and neutrons.
If X= the symbol of the element, A=the mass # and Z = atomic number, give the symbol for the phosphorus atom (Z=15) that contains 17 neutrons.
AZX =17+15 =32 =3215P
How does your body get rid of excess electrolytes? (2 answers)
1) By sweating
2) Urination
What is ionic bonding?
Ionic bonding is a bond formed by the transfers of electrons from one atom to another.
Rutherford came up with the nuclear atom. What is the nuclear atom?
An atom with a dense center of positive charge which is the nucleus surrounded by tiny electrons.
Give the # of protons, neutrons, and electrons in the atom symbolized by 9038Sr.
90-38=52 neutrons, 38 protons, and 38 electrons.
What is an ion?
An atom or molecule that has an electrical charge.
What is covalent bonding? Give example
What is polar covalent bonds? Give example
Covalent bonding is where electrons shared by the nuclei, distributed evenly. An example is H2O because the 2 H atoms share electrons with the O atom.
Polar covalent bonds are atoms that are not so different that electrons are transferred but are different enough to have unequal sharing of electrons.
How did Ruther come up with the nuclear atom model? (describe experiment)
Made an experiment involving directing alpha particles to a thin piece of foil. Some particles passed through and some bounced off. Proving that these particles have a small structure, making it able to pass through the foil.
132-55= 77 neutrons, 55 protons, and 55 electrons.
Why does salt water conduct so easily?
What is a metal?
What is a nonmetal?
A metal is a element that's shiny, malleable, and has good conductivity.
A nonmetal is a element that's dull, brittle, and poor conductivity.
What is electronegativity?
Electronegativity is unequal sharing of two atoms/the relative ability of an atom in a molecule to attract shared electrons to itself.