ATOM
PERIODIC TABLE 1
MOLECULLES
COMPOUNDS
Periodic Table 2
METALS VS NONMETALS
100
What is the maximum number of ELECTRONS the first ring/orbital shell can hold?
2 ELECTRONS
100
Russian chemist who is credited with creating the first widely recognized periodic table. (full name please)
Dmitri Mendeleev
100
A molecule is formed when two or more of these join together in a fixed ratio.
ATOMS
100
Often called table salt, this compound has the chemical formula NaCl.
SODIUM CHLORIDE
100
An element that has gained or lost an electron is referred to as
ion
100
They are typically shiny, ductile, malleable, and good conductors of heat and electricity.
METALS
200
What is the maximum number of ELECTRONS the second ring/orbital shell can hold?
8 ELECTRONS
200
These horizontal rows of elements in the periodic table are known by this name.
periods
200
This simplest diatomic molecule, composed of two of the same element, has the formula H₂.
HYDROGEN
200
A major greenhouse gas with the formula CO₂, it is also a byproduct of human respiration.
CARBON DIOXIDE
200
Found in Groups 3 through 12 on the periodic table, these metals often exhibit multiple oxidation states and form colored compounds.
TRANSITION METALS
200
These elements are generally poor conductors of heat and electricity and are often brittle in solid form.
NON-METALS
300
This subatomic particle has no charge.
NEUTRON
300
Elements in Group 2, including magnesium and calcium, are collectively known by this name.
alkaline earth metals
300
Why is the atomic mass not a whole number?
it is an average of all known isotopes
300
What are three physical properties of non-metals?
not shiny, not malleable (brittle), not ductile, poor conductors (good insulators), gain electrons, low density, low melting point
300
What category does the image represent?
An Element and a Compound
300
This term describes a metal’s ability to be pulled or drawn into wires without breaking.
DUCTILE
400
In a neutral atom, the number of these _____________ is equal to the number of ___________.
PROTONS, ELECTRONS
400
What are the 3 parts of an atom
Protons, electrons, and neutrons
400
This molecule with the formula NH₃ is a pungent gas used in fertilizers and many cleaning products.
AMMONIA
400
Known commonly as baking soda, this compound (NaHCO₃) is used to help dough rise.
sodium bicarbonate
400
These metals are known for having just one of these in their outermost electron shell, making them highly reactive.
GROUP 1 METALS
400
Chlorine, which is a gas at room temperature, and sulfur, often found as a brittle solid, belong to this category of elements.
NON-METALS
500
This Greek philosopher proposed that matter is composed of tiny, indivisible units called “atomos.”
Democritus
500
This English scientist developed the first modern atomic theory in the early 1800s.
John Dalton
500
Found in the outermost shell of an atom, these electrons play a key role in chemical bonding and determine an element’s reactivity.
VALENCY ELECTRONS
500
What is the least reactive family on the Periodic Table?
Noble Gases
500
What is the least reactive family on the Periodic Table?
NOBLE GASES
500
This element has an unusual exception since it conducts electricity but is still classified as a non-metal. What is it?
CARBON