Structure Of The Atom Flashcards
What are atoms made up of?
Shells, nucleus
………. are found in the shells.
Electrons
………. and ………. are found in the nucleus.
Protons, neutrons
What relative charge and mass do these parts of an atom have?
A) proton
B) neutron
C) electron
A) positive charge (+1) & relative mass of 1
B) no charge (0) & relative mass of 1
C) negative charge (-1) & no relative mass (negligible)
(T or F) Atoms have no overall charge. Explain your answer.
True, electrons have a negative charge, protons a positive charge and neutrons have no charge. Overall, atoms are electrically neutral because the number of protons equals the number of electrons, balancing out their charges.
What is the relationship between the number of protons and the number of electrons in an atom?
There are an equal amount of protons and electrons.
What is an atomic number?
The number of protons contained within the nucleus of the atom.
What is the mass number?
The sum of the number of protons and the number of neutrons in the atom.
If an element had 9 protons and 10 neutrons what would its atomic number and mass number be?
Atomic number: 9
Mass number: 19
Find the number of protons, neutrons and electrons using the information below:
11 <- Mass number
B <- State symbol
5 <- Atomic number
Number of protons: 5
Number of neutrons: 6
Number of electrons: 5
Find the number of protons, neutrons and electrons using the information below:
9 <- Mass number
Be <- State symbol
4 <- Atomic number
Number of protons: 4
Number of neutrons: 5
Number of electrons: 4
To find the number of neutrons in an atom we….
subtract the atomic number from the mass number
To find the number of protons in an atom we….
look at the atomic number
To find the number of electrons in an atom we….
look at the atomic number/number of protons because the n.o of protons = the n.o of electrons
