Exam-Atoms Flashcards
What are the basic building blocks of ordinary matter?
Atoms
What are the three basic parts of an atom?
Protons, neutrons, electrons
These subatomic particles make up the structure of an atom.
What is the structure of an atom centered around?
Nucleus in the center that contains protons and neutrons.
What surrounds the nucleus of an atom?
Electron Cloud which contain electrons
. The rings are referred to as orbits or shells.
What are the two main parts of an atom?
Nucleus, electron cloud
The nucleus is in the middle and the electron cloud surrounds it.
What is the charge of a proton?
Positive
Protons are positively charged subatomic particles.
Where are protons located in an atom?
Inside the nucleus
Protons are found within the nucleus of the atom.
What is the mass of 1 proton measured in atomic mass units (amu)?
1 amu
One proton contributes one atomic mass unit to the atom’s mass.
1 Proton=1 AMU
What does the atomic number represent?
Number of protons
The atomic number determines the identity of an element.
Where can the atomic number be found on the periodic table?
Upper right-hand corner
The atomic number is displayed in this position on the periodic table.
How many protons does Magnesium (Mg) have?
12
Magnesium is identified by having 12 protons.
How many protons does Gold (Au) have?
79
Gold is identified by having 79 protons.
