Atom and Atomic Models

The nucleus contains ______ and ___________

• electrons and protons

• protons and neutrons

• neutrons and electrons

• protons and ions

Most of the mass of an atom is in its orbitals

• true

• false, 99% of the mass is in the nucleus

• 50% is in its orbitals

• atoms have no mass

Protons have what type of charge?

• positive

• negative

• neutral

• fractional

Protons are free to move around the orbitals and levels of energy.

• true: they can move everywhere

• false: they are part of the nucleus and cannot "jump" outside

• they are in the nucleus most of the time but can move in the orbitals

• Protons and neutrons can jump orbitals

Schrödinger stated that: _______________

• Electrons don't spin in orbits but rather can be found in a cloud of probability

• Most of the atom is empty space

• Atoms can only exist in specific energy levels

• The atom is a solid sphere

The plum pudding model refers to: ___________

• a solid atom

• a positive nucleus and electrons spinning around

• a positive solid mass with negative particles embedded through the postive mass

• the planetary model

It is possible to know the exact location and speed of an electron at the same time

• false

• true

• the electrons don't have any speed

• electrons have only 1 specific location

The orbitals (clouds of probability where electrons can be found) have only one shape, and it is a sphere

• false, there are 4 different shapes

• true, all electrons can be found in a sphere

• there is only 1 elepitical shape

• there are10 different shapes

What are the names of the 4 orbital shapes?

• A, B, C, D

• s, p, d, f

• alpha, beta, gama, delta

• Bohr, Pauli, Thomson, and Dalton

How many electrons can fit in each orbital?

• 2

• 14

• 10

• 1