Vocab 1
Two elements with the same number of protons but a different number of neutrons are called?
Isotopes
Which element has properties that are similar to neon?
Aluminum
Argon
Arsenic
Silver
How many neutrons are in Nitrogen.?
7
Mass-atomic number
14-7=7
The periodic table is organized into columns called what?
Groups or Families
Carbon has a mass of 13. How many neutrons does Carbon have? C-13 is known as what?
7 neutrons
Isotope
The positively charged center of an atom is called?
Nucleus
How many valence electrons(outer most shell) does lithium and potassium have?
1
How many protons are in Krypton
36
How many quarks have been found?
6
This particle is neutral and located inside the nucleus
Neutron
Particles that make up protons and neutrons are called?
Quarks
What 2 items are found in the nucleus of an atom
Protons and Neutrons
The atomic number for Re is 75. The atomic mass of one of its isotopes is 186. How many neutrons are in an atom of this isotope.
111 neutrons
Which group of the periodic table is considered noble gases
Group 18
Electrons
Electron cloud
A(n) __________________ is a horizontal row in a periodic table.
Period
Si is the element symbol for which element?
Silicon
How many electrons are in Tungsten
74 electrons
He is the chemical symbol for which element
Helium
This model represents valence electrons(outer most shell)
Electron dot diagram
The sum of protons and neutrons is called?
Mass number(atomic mass)
What is Chlorine chemical symbol?
Cl
How many valence electrons(outer most shell) does Iodine have?
7 Valence Electrons
He has how many valence electrons(outer most shell)
2
This positively charged particle is called what and located where
Proton
Nucleus