The Atom
What are the 3 types of subatomic particles that make up atoms?
Protons, neutrons & electrons
Who conducted the famous gold foil experiment?
Ernest Rutherford
How many elements are currently on the periodic table?
118
What are the 2 types of chemical bonds formed during chemical reactions?
Covalent & ionic
How many is a mole of something?
6.02 x 10^23
What is an atom called if it loses or gains electrons?
An ion.
Which scientist showed that Brownian motion is caused by the movement of atoms.
Albert Einstein
What are the elements in Group 18 of the periodic table called?
Nobel gasses
What type of chemical bond is formed when atoms share electrons?
Covalent bonds
Which type of elements typically gain electrons when they form ionic bonds?
Non-metals
What are the electrons in the outer orbit of an atom called?
Valence electrons
Who used a cathode ray tube to discover electrons?
J.J. Thompson
What are the elements in Group 1 called?
Alkali metals
What is formed when atoms share 2 pairs of electrons?
A double bond
What are atoms of the same element that have different numbers of neutrons called?
Isotopes
What is the maximum number of electrons that the first orbit can hold?
2
Which scientist created the first periodic table?
Dmitri Meneleev
What are the elements in Groups 3-12 called?
Transition elements
What type of bond holds NaCl together?
Ionic bond
How many of the elements occur naturally?
98
How many neutrons does carbon-14 have?
8
Who discovered the neutron?
James Chadwick
How many valence electrons do elements in Group 13 have?
3
Elements react in order to have the electron configuration of which group of elements?
Nobel gasses
Who proposed that electrons can only be in specific orbitals?
Neils Bohr