2.1 Study Guide Flashcards
Where are protons located in the atom?
They are located in the nucleus
Where are the electrons located in an atom?
They are located outside of the nucleus.
Where are the neutrons located in an atom?
They are located in the nucleus.
What is the definition of an isotope?
When an element has the same number of protons and electrons as the rest but has a varying number of neutrons causing the atom to have a different mass.
What is the mass of protons?
Heavy
What is the charge of protons?
+1
What is the mass of neutrons?
Heavy
What is the charge of neutrons?
0
What is the mass of electrons?
Virtually Nothing
What is the charge of electrons?
-1
What do protons do in the atom?
They determine the identity of the atom.
What do electrons do in the atom?
They determine the reactivity of the atom.
What do neutrons do in the atom?
They balance out the protons so the element is stable or unstable.
What is the atomic mass of an element that has 8 protons, 8 neutrons, and 10 electrons?
16 is the Mass.
What is the net charge of an element that has 16 protons, 15 neutrons, and 19 electrons?
The Net Charge is -3
What is the element if there are 8 protons, 9 neutrons, and 12 electrons?
Oxygen
How many protons are there if the element is Neon, with a net charge of -1, and a Mass of 21?
There are 10 protons
How many electrons are there if the element is Chlorine, with a net charge of -3, and a Mass of 25?
There are 20 electrons
What is one reason isotopes can be useful in scientific research?
Radioactive Isotopes can be used to date artifacts and older fossils. They can use the isotopes to determine the half-life of the isotope.
