Vocabulary
A small particle that is the building block of matter; the smallest piece of an element that still represents that element
What is an atom?
What is the number of protons and electrons?
These types of elements are located on the left and middle of the periodic table; they have characteristics like luster, ductle and good conductors.
What are metals?
Anything that has mass and takes up space
What is matter?
The law of conservation of mass (matter) states that matter cannot be what
What is created or destroyed?
A region in the center of an atom where most of an atom’s mass and positive charge are concentrated
What is the nucleus?
This is the number of protons in nitrogen.
What is 7?
This is the name for the 'step ladder' of elements near the right side of the periodic table; they have characteristics of metals AND nonmetals and include the elements boron, silicon, germanium, arsenic, and antimony.
What are the metalloids?
Matter with a composition that is always the same
What is a substance?
This is the name for a starting substance in a chemical reaction
What is a reactant?
A force that holds two or more atoms together
What is a chemical bond?
This is how you figure out the number of neutrons in an element.
What is subtract the atomic number from the atomic mass?
This term means able to be hammered or pressed into sheets without breaking or cracking.
What is malleable?
Magnetism is this type of property
What is physical property?
In our law of conservation of mass lego lab, this is what the legos represented and this is what connecting two or more legos represented.
What are atoms and chemical bonds?
A description of a reaction using element symbols and chemical formulas. For example:
O2 + 2H2 -------> 2H2O
What is a chemical equation?
This is the correct number of protons, neutrons, and electrons in the element sodium.
What is 11 protons, 11 electrons, and 12 neutrons?
This increases by 1 as you move across the periodic table.
What is the atomic number and/or number of valence electrons?
This is the type of matter that air is.
What is a mixture?
Identify the coefficient and subscripts in the chemical formula below AND explain what each means.
5C12H22O11
(sucrose)
What is a coefficient of 5 meaning 5 molecules of sucrose, and subscripts of 12 (meaning 12 carbon atoms in 1 molecule of sucrose), of 22 (meaning 22 hydrogen atoms in 1 molecule of sucrose), and 11 (meaning 11 oxygen atoms in 1 molecule of sucrose)
A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound
What is a chemical formula?
This is the number of protons, neutrons, and electrons in the element lead.
What is 82 protons, 82 electrons, and 125 neutrons?
This is the name for group number 7 (or 17) on the periodic table.
What are the halogens?
This is the type of change that occurs when a round, solid mothball made of napthalene produce a toxic vapor in a closet.
What is a physical chance (sublimation)?
A student writes the following chemical equation:
C2H4O2 + NaHCO3 ------> NaC2H3O2 + H2O
What else does the student need to write on the right to show law of conservation of mass?
What is carbon dioxide gas? (CO2)