Atoms
negative
atomic number
Who designed the periodic table?
What is the atomic mass of Zirconium (Zr)
91.224
Water freezing is a chemical or physical change?
Physical
what kind of charge does a neutron have?
neutral
how do you find the number of electrons in an element?
atomic number
The periodic table is arranged in order of increasing ____________________
atomic number
Which element has 33 protons?
Arsenic (As)
Iron rusting is a chemical or physical change?
chemical
WHat kind of charge does a proton have?
positive
How do you find the number of neutrons in an element?
atomic mass-atomic number
Which group is the noble gases?
Group 18
How many neutrons does Antimony (Sb) have?
71
The nucleus of the atom is made up of ___________ and ____________
protons and neutrons
They are located inside the nucleus
which groups on the periodic table are most reactive?
1 and 17
WHat is special or important about groups on the periodic table?
they have similar properties
name an element that is similar to Zinc (Zn)
Cadmium (Cd), Mercury (Hg), or Copernicium (Cn)
What are 4 properties of metals?
conduct heat
conduct electricity
luster
malleable
atoms are made up of mostly _________ space
empty
which group on the periodic table is least reactive?
Group 18 (noble gases)
What are there more of on the periodic table: metals, metalloids, or non-metals?
Metals
Which element is most reactive?
Gold (Au), Tungsten (W), Iridium (Ir), or Cesium (Cs)?
Cesium (Cs)
Matter can be neither created nor destroyed
Law of Conservation of Mass