1
What is matter made up of?
Atoms
What is atomic structure?
Nucleus is made up of protons and neutrons and is surrounded by electrons
What is the atomic number?
The number of protons in the atom
What kind of charge does a neutron have?
Neutral because protons and electons cancel each other out (think neutron = neutral)
How is te periodic table organized? periods and groups
7 periods, 18 groups
Are atoms the smallest particles of matter?
No! (maddie read the paper)
Why? Because they are made up of neutrons electrons and protons! (subatomic particles)
What is atomic Mass?
protons plus neutrons
What is atomic mass measured in?
AMUs (atomic mass units)
where do elements come from?
stars, nuclear reactors, or particle accelerators
What is it called when nuclei collide?
Nuclear fusion
What is reactivity?
The ease and speed one element combines with another.
What is created when a metal with another metal?
Alloy
What makes an isotope unstable?
Different number of protons from neutrons
What is created when two atoms combine?
Diatomic moecule
What causes an element to change into another element?
an unstable isotope
What re three types of radioactive decay
Two protons and two neutrons break away from the nucleus
How are the elements that follow uranium produced?
Synthetically: made with nuclear reactors or particle acelerators
How can you predict the properties of an element and its number of electrons?
Location on th table - periods tell you how many rings in Bohr's model, groups/families tell the characteristics