Atoms
Vocab
periodic table
understanding elements
100
The center of an Atom is called the what?
Nucleus
100
The basic building block of matter?
Atom
100
Negatively charged particle?
electron
100
How many atoms are in the molecule H2O?
3 atoms total:
two Hydrogen and one Oxygen
200
The positively charged particle?
Proton
200
The small parts that make up the atom?
Subatomic particles
200
The atomic # of an element tells us what?
the number of protons
200
3 LI+1
7
This Lithium ion has how many protons?
atomic number=protons
so this has 3 protons
300
What is matter?
anything that has mass and occupies space
300
Substance that contains only a single type of atom?
Element
300
What is the chemical symbol for mercury?
Hg
300
11 NA+1
23
This sodium ion has how many neutrons?
12 neutrons
400
In an atom, which has the least mass? A: nucleus B: proton C: neutron D: electron
electron
400
A variation in the number of neutrons of an element is called this?
(Remember chocolate chip cookies)
Isotope
400
This scientist was the person who developed the periodic table we use?
Dmitri Mendeleev
400
9F-1
19
This fluorine ion has how many electrons?
Remember if it has a -1 charge it has one more electron than protons.
This Fluorine has 10 electrons
500
The atomic mass is what?
protons + neutrons
500
A group of two or more atoms that are chemically bonded?
molecule
500
What properties do we expect elements in the same group (column) to share?
conductivity
reactivity
malleability
500
What element is this?
Helium