True or False
Atoms of the same element that have different number of neutrons are called isotopes.
What is true.
Horizonal rows in the periodic table are called this.
What are periods.
List the following in size order from small to large: molecule, cell and atom.
What is atom, molecule and cell.
A valence electron is this.
What is an outermost electron that participates in chemical bonding.
How many valence electrons does an atom of Cl, C, and H?
What is 7, 4, and 1.
Two atoms of different elements will definitely have a different number of protons.
What is true.
Vertical Columns on the periodic table are called this and have similar what?
What is groups and properties.
An neutral group of atoms joined by covalent bonds is a(an)
What is molecule.
An atom with this many valence electrons is most stable.
What is 8.
How many more electrons are needed to make a chlorine, carbon, and hydrogen atom stable?
What is 1, 4, and 1.
On the periodic table, each element has a unique name and formula.
What is false, symbol.
Metals are located here on the periodic table.
Where is the left side of the table.
An Ionic Bond forms when....
What is a metal loses an electron and a nonmetal gains an electron.
When an atom loses an electron, a(an) _____________ ion forms.
What is positive.
Fill in the missing information:
Element: p = 12, n = 12, e = , Charge = +1, Atomic Mass =
What is Magnesium, e = 11, Atomic mass = 24?
A combination is a substance formed when 2 or more different elements combine.
What is false, compound.
If a neutral copper atom (atomic #29) becomes an ion that has a charge of +2, the amount of electrons will be.....
What is 27 electrons.
This is an element.
What is a pure substance that cannot be separated by physical or chemical means?
How many molecules, individual atoms and total atoms does 2H2O have?
What is 2 molecules, H= 4, O = 2, total atoms = 6.
Two main types of chemical bonds are physical and ionic.
What is false, covalent.
This is how elements are arranged on the periodic table.
What is in row and columns according to their properties.
An atom with 9 protons and 10 electrons will have a charge of what and explain why.
What is -1 because it gained an electron.
This is a compound.
What is a pure substance made up of 2 or more elements, that has different properties?
How many molecules, total atoms and individual atoms does 6H2SO4 have?
What is 6 molecules, H = 12, S = 6, O = 24 and total atoms = 42.