Subatomic Particles
What is the name of the positive subatomic particle?
Proton
What charge does a neutron have?
Neutral/Zero
What is the symbol for potassium?
K
Round the atomic mass of sodium (Na)
22.99 amu --->23 amu
What charge does an electron have?
Negative
How do you calculate the number of neutrons in an atom?
Mass Number - Number of protons = Number of Neutrons
What is the name of an atom with the symbol Ne?
Neon
What is the difference between atomic mass and mass number?
Atomic mass is an average of the mass of all isotopes of that element while mass number is just the number of protons and neutrons (rounded number).
Which subatomic particles reside in the nucleus of the atom?
Protons and neutrons
If an atom has a mass of 35 amu and 17 protons, how many neutrons does it have?
35 - 17 = 18 Neutrons
What is the atomic mass of oxygen?
16.00 amu
What is an isotope?
Atoms with the same number of protons but different number of neutrons (diff mass).
Where are electrons located in an atom?
Electric shells/ Electron cloud
Calculate the number of neutrons for magnesium (Mg)?
24.31 amu ----> 24
24-12 = 12 neutrons
Which element has the atomic number 28?
Nickel
Write the isotopic notation of the element Phosphorous (P).
Phosphorus-31
Round the atomic mass of the element
What is the charge of the nucleus of an atom? And why?
Positive because of the protons
How many neutrons does the following isotope have?
Boron -15
Atomic number = 5
15-5= 10 neutrons
Which element has 13 protons?
# of protons is the same as atomic number
What is the mass of the following isotope?
Nitrogen-15
15 amu