Honors Chemistry Unit 2 Test 1

A charged atom

Mostly solids & good conductors

Theory that stated that electrons travel in fixed orbits around the nucleus

Theory that stated that an atom is positively charged with negatively charged particles embedded throughout

AKA families; vertical columns on periodic table

The mass of atoms and how tightly packed the particles of it are determines...

If an atom is neutral...

A charged (positive or negative) atom is called a(n)

Particles of matter that make up protons and neutrons; their attraction holds the nucleus together

Which of the following is the most abundant?

A subatomic particle that has a positive charge & is found in the nucleus of an atom

Weighted average of all the different versions of an element; measured in amu

Atoms of the same element with a different number of neutrons

What makes up the nucleus?

What determines the amount of energy levels?

Less electrons, more likely to lose; more electrons, more likely to gain

If Phosphorus has 15 Protons & 16 Neutrons, what is the atomic mass?

A subatomic particle that has no charge and that is found in the nucleus of an atom

What is the force between the nucleus & the electron cloud?

Which makes up the identity of an atom?

In a neutral atom, the number of protons equals the number of neutrons.

_______ have a different number of neutrons than the average for that element.

Volume of is in the electron cloud because the distance between electrons as they repel each other & take up more space

What is the atomic number for Phosphorus (P)?

Can the number of protons change and affect the mass?

Horizontal rows on periodic tables

Unique characteristic of ________: have a full valence energy level

Good semiconductors, physical properties of metals and chemical properties of nonmetals

Overcomes the repulsive force between protons and neutrons and holds the nucleus together due to quarks

A subatomic particle that has a negative charge and is found outside the nucleus in the electron cloud

Theory that stated that electrons are in shells in the cloud but do not travel in fixed orbits

Holds the electron cloud to the nucleus

The number of valence electrons are determined by...

Why is the mass of the atom located in the nucleus?

What is the force between the electrons in the cloud?

Which determines the charge of an atom?

Mostly gases, not good conductors

Why do noble gases share this unique characteristic?

The smallest unit of an element that maintains the properties of that element

What makes up the nucleus of an atom?

Can you calculate the amu & draw a bohr model?

How does the number of neutrons affect the mass?

Theory that stated that the center of the atom (nucleus) is positive & the negative part surrounds it

Number of protons & neutrons in the nucleus of an atom

Number of protons in an element; used to identify the element