Atomic Structure
What particle shows the identity of an element?
Protons
What does the atomic number of an element represent?
Which particle in an atom has a positive charge?
Protons
What type of reaction occurs in nucleus power plants?
Nuclear fission
How many neutrons does Carbon-14 have?
8
Where is the atomic mass located?
Bottom, bigger number
What do all elements in the same period have in common?
They are in the same horizontal row on the periodic table.
Which particles in an atom has no charge?
Neutron
What nuclear reaction happens on the sun?
Nuclear fusion
What is the term for an atom that gains or loses an electron?
Ion
How many valence electrons does a neutral atom of Silicon (Si) have?
4
Which group and period is Lead (Pb) in on the periodic table?
4a, 14
Where are the protons and neutrons located in an atom?
The nucleus
What particle is released in beta decay?
A (negative) electron
What happens when an atom gains or loses a neutron?
It becomes an isotope.
In Bohr's atomic model, where are the electrons placed?
In orbitals (rings) based on energy levels
1=2
2=8
3=8
How can the group number for an elements help in identifying it's properties?
It indicates the column on the periodic table and the number of valence electrons.
Which particle is negatively charged?
Electron
In beta decay, what particle does a neutron turn into? What does it emit?
Turns into a proton, emits a negative electron particle.
Draw a Bohr model for a Sodium atom with a charge of -3.
DAILY DOUBLE: -correct drawing with 14 electrons:
1st ring: 2
2nd ring: 8
3rd ring: 4
What happens when an atom becomes a cation?
It loses an electron.
Why do noble gases on the periodic table generally not form ions?
They have a full outer valence shell, making them stable at 8.
Which two particles contribute to the atomic mass?
Protons and neutrons
What particle is released when Radium-226 undergoes alpha decay?
Helium
Protons=7
Neutrons=7
Electrons=10