People we hate to know
Mendeleev arranged the periodic table by atomic what?
Atomic mass
These elements are lustrous, hard, malleable and ductile and good conductors.
Metals
Atomic Radius:
Lithium or Oxygen
Lithium
Distance from center of nucleus to its outermost electron. Determined by electron cloud
Atomic Radius
Which element is alone in its own family
Hydrogen
Out of atomic number, electron structure, electronegativity, and atomic mass, which is NOT in a cell on the periodic table.
electronegativity
This scientist revised the periodic law, used atomic numbers to arrange elements and discovered X-rays
Henry Mosley
These elements are semiconductors and are located along the stairstep line on the periodic table. These elements include Silicon and Arsenic
Metalloids
Electron affinity: Alkali metals or halogens
Halogens
Measure of attraction between nucleus and valence electrons. In most cases, it is a measure determined by an atoms ability to bond in compounds and the attraction of the bonded atoms to electrons.
Electronegarivity
The most commonly used metals are what kind of metals?
Transition elements
Elements with atomic numbers greater than Uranium are called what?
Transuranium elements
This man arranged elements in triads based on similar properties.
Johann Dobereiner
This group of elements are on the far right of the periodic table and includes Oxygen, Nitrogen, and sulfur
Nonmetals
Electronegativity
Fluorine or copper
Fluorine
Amount of energy needed to add an extra electron, creating an anion. It measures the energy released when another electron joins
Electron affinity
Lanthanide and actinide are known as these kind of metals
Inner transition
This makes up 21% of the earth's atmosphere
Oxygen
Who left spaces blank on the periodic table but correctly predicted properties of them
Mendeleev
This group of inert gases have very little reactivity and includes Argon and Neon.
Noble gases
Ionic radius
Cations or anions
Anions
The ease that an atom can acquire or give electrons to make compounds and predict chemical reactivity. The energy it takes to remove the outermost electron.
Ionization energy
The element found in most living things and forms graphite and diamonds.
Carbon
Lightest and most abundant element in the universe, is flammable and is used to make ammonia
Hydrogen
First scientist to arrange elements in groups based on chemical properties.
Dobereiner
This non-metallic element is called brimstone in the bible, can be brittle and yellow and turns to liquid when high heats are applied. It stinks too
Sulfur
Ionization energy and electron affinity:
Carbon or Aluminum
Carbon
Positive ions are called what
Cations
Fluorine, chlorine, and Bromine are a part of this group that tend to have the strongest electron affinity, and can form salts and acids
Halogens
All of the noble gases, except these 2 have been forced into making compounds with other elements
Argon and Neon