Valence Electrons
Most atoms form bonds using which type of electron?
valence electrons
On the periodic table, atoms in the same _______have the same number of valence electrons
group
What are charged particles that form when atoms gain or lose electrons?
ions
Covalent bonds form between what two types of elements?
nonmetal and nonmetal
The ability of metal to be hammered into sheets
malleability
How many electrons fill the outermost energy level of most atoms?
8
Elements on the periodic table are grouped based on which of the following?
similar properties
When ions bond, what is the regular pattern called?
crystal lattice
Atoms that do not easily lose electrons form ________.
covalent bonds
The ability of metal to be drawn into wires
ductility
Used to show the valence electrons in an atom
electron dot diagram
What range of group numbers are considered to be the "transition metals"
groups 3-12
What do you call a bond that forms when electrons are transferred from one atom to another?
ionic bond
What is a molecule made up of two atoms of the same element?
diatomic molecule
Causes metals to be bent, but not broken
moving electrons
An atom of nitrogen has exactly 5 valence electrons. How many more does it need to fill its outer energy level?
3 more
What two scientists were given credit for creating and improving the periodic table?
Mendeleev and Moseley
What do metal atoms form when they lose valence electrons?
positive ions
Name one example of a covalent bonded molecule of two hydrogen atoms and one oxygen atom.
What does science call a mixture of copper and zinc that are metallically bonded together? Brass is an example of a metal ______________.
Alloy
What three elements have their outer energy level filled with only two valence electrons?
hydrogen, helium, and lithium
What group of the periodic table have elements that have 8 valence electrons in their outer energy level?
group 18 - noble gases
When atoms gain electrons during chemical changes, what charge do they have?
negative
Are covalent bonded molecules more likely to be a solid or a liquid at room temperature?
liquid
Why are metallic bonded metals good conductors of heat and electric current?
metal atoms positive ions and free moving electrons are REAL close together