Quiz On 3/10/16: Flashcards
Atomic Number
Number of protons in an atom.
Electrons
Negatively charged atomic particle outside the nucleus of an atom.
Isotopes
Atom of an element that differs in number of neutrons from other atoms of the element.
Metalloids
Class of elements that have some properties of metals and some properties of nonmetals.
Metal
Class of elements that are good conductors of electricity.
Neutron
Electrically neutral atomic particle inside the nucleus of an atom.
Non-Metal
Class of elements that do not conduct electricity.
Protons
Positively charged atomic particle inside the nucleus of an atom.
Valence Electron
Electron in the outer energy level of an atom that is potentially involved in chemical reactions.
Malleability
Ability of metal to be hammered into thin sheets.
Ductile
Ability for metal to be drawn out into a thin wire.
Atomic Mass
SI unit for the mass of an atom.
How do you find the number of protons on the periodic table?
Same number as the atomic number (bottom left)
How do you find the number of electrons on the periodic table?
Same number as the atomic number (bottom left)
How do you find the number of neutrons?
Atomic mass (bottom of the element) minus the atomic number (top of the element)
How do you find the valence electrons on the periodic table?
It is the number on top of each row.
Where is the atomic number?
The top of the element symbol.
Where is the atomic mass?
Below the element symbol.
How are metals, metalloids, and nonmetals different?
Metals = Conduct electricity very easily. Nonmetals = Poor Conductors Metalloids = Okay conductors, it varies.
Why is the arrangement of the periodic table helpful?
Helps us to see patterns.
What sort of elements they are.
What group they belong too.
The elements state of matter.
Why is the atomic mass a decimal?
Because this number is average of all the isotopes in the element, it is also an average of all the particles in an element.
