Groups
Are Alkali Metals very reactive, or non-reactive?
Very Reactive
Are Protons positive, neutral (no charge), or negative?
Positive
An atom of an element that has a different number of neutrons
Isotope
What is the symble for Zinc, and it's atomic number?
Zn
30
Are most elements metals or non-metals?
metals
Are Alkaline Earth Metals very reactive, or non-reactive?
Very Reactive, but less reactive than Alkali Metals
Are Neutrons positive, neutral (no charge), or negative?
Neutral
When atoms lose or gain electrons they become..
Ions
What is the atomic mass for Oxygen?
15.999
The human body is made up of mostly what elements?
oxygen, carbon, hydrogen
Are Noble Gases reactive or non-reactive?
Non-Reactive
Are Electrons positive, neutral (no charge), or negative?
Negative
Smallest form of elements in the universe
Atoms
What are the number of protons and electrons in Lithium?
3 (for both)- same as the atomic number
Read a periodic table by looking at what number that increases/goes in order?
Atomic Number
Metal
Atomic Mass equals (____ + _____)
Protons + Neutrons
Central part of the atom
Nucleus
Atomic Number for Bromine is 35, and the atomic mass is 79.904. How many Neutrons are there?
44.904
Are halogens metal or non-metal?
non-metal
Are Noble Gases metal or non-metal?
Non-Metal
How do you find the number of protons of an element by looking at the periodic table?
Atomic Number (which is also the number of electrons)
Groups and Periods. Which direction on the periodic table?
Periods- rows (across)
Groups- Columns (up and down)
Symbol: B
Atomic #: 5
Atomic Mass: 10.81
How Many Protons, Electrons, and Neutrons?
Protons: 5
Electrons: 5
Neutrons: 5.81