Question | Answer |
Elements are arranged this way on current periodic table | increasing atomic number |
Overall charge of an atom | neutral |
charge of the nucleus of an atom | positive |
Can be hammered without breaking. | Malleable |
Name of Group 1A Elements | Alkali Metals |
Name of Group 2A Elements | Alkali Earth Metals |
Name of Group 7A Elements | Halogens |
Name of Group 8A Elements | Noble Gases |
Vertical columns on P.T. are called what? | Group/Family |
Horizontal Rows on P.T. are called what? | Period |
Can be formed into wires | Ductile |
Cannot be hammered; Will shatter | Brittle |
Another word for a poor conductor of heat or electricity | Insulator |
80% of the periodic table is made up of these | Metals |
Is the sum of protons + neutrons | Atomic Mass |
Is the number of protons only | Atomic Number |
Subatomic particle with a positive charge | proton |
Subatomic particle with a negative charge | electron |
Subatomic particle with no charge | neutron |
change in number of protons | different element |
change in number of neutrons | isotope |
change in number of electrons | ion |
Element that is a nonmetal in group 1 (1A) | Hydrogen |
B, Si, As, Te, At, Si, Sb are the 7 elements that are... | metalloids aka semiconductors |
Subatomic particles found in the nucleus | protons + neutrons |
Subatomic particles that must be equal so atom has neutral charge | protons + electrons |
Elements were arranged this way on the 1st periodic table | increasing atomic mass |
Charge of the nucleus only | positive |
Charge of the entire atom | zero (neutral) |
name of elements from Groups 1A - 7A | representative |
electrons found closer to the nucleus of an atom | core |
electrons found furthest from the nucleus of an atom | valence |
Contribution made by electrons to the atom | volume and chemical properties |
Contribution made by protons to the atom | identity and 1/2 atomic mass |
Contribution made by neutrons to the atom | 1/2 atomic mass |
top row of f block belongs to this period | 6th period |
bottom row of f block belongs to this period | 7th period |