Question | Answer |
Two subatomic particles found in the nucleus | protons and neutrons |
Subatomic particles with a positive charge | protons |
Subatomic particle(s)identified by the atomic number for a neutral atom | proton or electrons |
Subatomic particles with a negative charge | electrons |
Decimal number in the periodic table square | atomic mass |
Visually shows the number of valence electrons as dots around the chemical symbol of an element | Lewis Dot diagram(s) |
whole number in the periodic table square | atomic number |
building blocks of elements | atom |
found inside the nucleus, have a positve charge, and a mass of 1 amu | protons |
Used to identify the number of energy levels for an atom | period |
type of matter composed of only one type of atom | element |
type of matter where two or more elements are chemically bonded together | compound |
only metal touching the metalloid staircase | aluminum |
Elements in group 2 | alkaline earth metals |
Elements with similar chemical properties are found in the same.... | group |
only metal in liquid state at room temperature | mercury |
maximum number of electrons held by the second energy level | eight |
an atom with a change in electrons but constant proton count | ion |
an atom with the same proton count but a change in mass due to a change in neutron count | isotope |
Elements in group 17 | halogens |
subatomic particle count found by subtracting the mass number and atomic number | neutrons |
Elements in the detached rows at the bottom of the periodic table | rare earth or inner transition metals |
electrons found in the last or outermost energy level | valence electrons |
The dots in a Lewis Dot diagram | valence electrons |
atomic number represents this particle in a NEUTRAL atom | electrons |
small, dense core of the atom | nucleus |
Elements in group 18 | noble gases |
Maximum number of electrons found in the third energy level | eighteen |
Maximum number of electrons found in the fourth energy level | thirty-two |
only non-metal on the left side of the periodic table; may have either a +/-1 charge | hydrogen |
special name for any particle found in the nucleus | nucleons |
subatomic particles with a mass of 1 amu and no charge | neutrons |
rounded version of the atomic mass;sum of protons and neutrons for one isotope | mass number |
Maximum number of electrons in the energy level closest to the nucleus | two |
Elements in Group 1; except hydrogen | Alkali metals |
Chemically inert or unreactive elements because they have a complete valence shell | noble gases |
elements found in groups 3 through 12 | transition metals |
smallest form of matter | atom |
Most active non-metal element | fluorine |
Most active metal element | cesium |
only non-metal liquid at room temperature | bromine |
Subatomic particle with a negative charge and essentially no mass | electron |
vertical columns of the periodic table | groups or families |
horizontal rows of the periodic table | periods |
Identifies the valence electron count for an element except the transition metals | group number |