Periodic Table
What number tells you the number of protons and electrons?
Atomic Number
What is the 'brain' of the atom?
Nucleus
Non-metal; Lemon-yellow in natural state; Blood red when melted; Emits blue flame when burned
Found near hot springs
Sulfur
What element has the symbol Xe?
Xenon
Who created the 1st periodic table of elements?
Mendeleev
How do you figure out the number of neutrons?
Subtract the atomic number from the atomic mass
What particle has a positive charge?
Proton
What element has an atomic mass of 238.
U, Uranium
What element has 17 electrons?
Chlorine
How are modern periodic tables arranged?
Increasing atomic #
How do you find an element's atomic mass?
Add the number of neutrons and the number of protons together
What particle has no charge?
Neutron
Alkali metal; Soft, silvery-white color; One of the only four elements that was created in the first three minutes of the universe; Used in cell phone batteries
Lithium
Non-metal; Colorless gas; Makes up 78% of the Earth’s atmosphere; Found in living tissue
As a gas, causes frostbite on human skin; used to remove warts and moles
Nitrogen
In the periodic table, what is a row called?
Periods
How many liquids are on the periodic table?
2
What particle has a negative charge?
Electron
Alkaline earth metal; Found in the Earth’s crust; Burns in the air to create a brilliant white light; Used to make fireworks and marine flares
Good for the body
Magnesium
What element is a gas with 22 neutrons?
Argon
What are the properties of metals?
Luster, malleable, ductile, thermal conductivity, electrical conductivity
What does the term 'valence electrons' mean? (2 things)
number of electrons on outermost shell, tells how reactive an element is
What subatomic particle is not inside the nucleus?
Electrons
Alkaline earth metal; Used as a hardening agent; Has excellent conductivity; sound and electricity move through it very quickly; Lightweight; used to build high-speed aircraft, missiles and satellites
Beryllium
What element is named after a planet & has 93 electrons?
Neptunium
The deterioration of a metal due to a chemical reaction in the environment is called ___
corrosion