Chapter 2: Notes Flashcards
Group 2 on the Periodic Table is called________.
Alkaline earth metals
Group 1 on the Periodic Table is called__________.
alkaline metals
Group 3-12 on the Periodic Table are called________.
Transition metals
Group 17 on the Periodic Table is called_________.
Halogen
Group 18 on the Periodic Table is called________.
Noble Gases
Explain the Atomic Theory
1) Each element is composed of tiny, indestructible particles called atoms.
2) All atoms of a given element have the same mass and other properties that distinguish them from the atom of other elements.
3) Atoms combine in simple, whole number ratios to from compounds.
4) Atoms of one element can not change into atoms of another element. In a chemical reaction, atoms only change the way that they are bound together with other atoms.
Who performed experiments to probe the properties of cathode rays
J.J Thomson
True or False:
Protons and neutrons have charges of the same magnitude but opposite signs.
False
True or False:
Protons have the same mass as neutrons.
True
True or False:
Some atoms don’t have any protons.
False
True or False:
Protons and electron have charges of the same magnitude but opposite sign.
True
True or False:
If an atoms has an equal number of protons and electrons, it will be charged-neutral.
True
True or False:
Electrons are attracted to protons.
True
True or False:
Electrons are much lighter than neutrons.
True
True or False:
Protons have twice the mass of neutrons.
False
