C1 Flashcards
What is the radius of an atom
1 x 10-10 (one times ten to the power of minus ten)
Where is the nucleus in an atom
The nucleus is in the middle of an atom
What is in the nucleus
The nucleus contains protons and neutrons
What is the radius of a nucleus
The radius is 1 x 10-14( one times ten to the power of minus fourteen)
What is the charge of the nucleus
The nucleus has a positive charge because of the protons
What is the mass of the atom
Almost all the mass of the atom is concentrated in the nucleus (give a figure)
Where do electrons move
Electrons move around the nucleus
What is the charge of the electron
There is a negative charge and they cover a lot of space
How do you determine their orbit
The volume of their orbit determines the size of the atoms
What is the electron mass
Electrons virtually have no mass
What is the charge of protons and electrons
Protons and electrons have an equal charge
What is the charge of an atom
Atoms have a neutral charge which is a 0 (unlike ions) this is because the equal number of protons and neutrons
Are protons and electrons equal in an ion
The number of protons and electrons are not equal in an ion this is because the overall charge for example an ion with a 2- charge has two more electrons than protons.
Where is the mass number on an element
The mass number is the top number
Where is the atomic number on an element
The atomic number is the bottom number
What is the atomic number equal to
The atomic number is equal to the protons
What is the mass number equal to
The mass number is the sum of protons and neutrons
How do you work out the number of neutrons in an element
You take away the atomic number from the mass number
How is an element formed
An element is formed formed by maultiple atoms which all have the same number of protons within their nucleus
How is an atom decided what type of atom it is
Atoms all different numbers of protons, neutrons and electrons. It’s the number of protons within the nucleus that decide what type of atom it is e.g. an atom with one proton in its nucleus would be hydrogen and a proton with two protons in its nucleus would be hellium
What is an element
If a substance only contains atoms with the same number of protons it is called an element. There are about 100 different types of elememts
How are atoms represented
Letters will represent atoms C- carbon O-oxygen Na-sodium Pb-lead
What is an isotope
Isotopes are different forms of the same element,which have the same number of protons but a different number of neutrons
