Chemistry: Subatomic Particles

Advanced Chemistry - Unit 1

What is the mass of a proton?

1 amu

What is the mass of neutron?

1 amu

What is the mass of an electron?

0 amu

What are the charges of all three subatomic particles?

1. Proton = +1 

2. Electron = -1 

3. Neutron = 0 

How do you determine the mass number of an atom?

Protons + Neutrons

Which subatomic particle determines the identity of an atom?

Protons

Which subatomic particle determines the stability of an atom?

Neutrons

Which subatomic particle determines the reactivity of an atom?

Electrons

What is atomic number ALWAYS equal to?

The number of protons in the atom

What is the definition of an isotope?

different numbers of neutrons, different mass numbers

Which subatomic particle has a charge of +1?

Proton

Where are electrons located in an atom?

Outside of the nucleus in the electron cloud 

What is the role of electrons in an atom?

Reactivity/Bonding 

What is the role of neurons in an atom?

Stabilizes the nucleus/holds the nucleus together 

Where are both protons and neutrons located in the atom? 

nucleus of the atom 

What is the role of protons in an atom?

Identity of the atom 

In a neutral atom, protons and electrons are ______________ to each other

equal

What is type of mass number is found on the periodic table?

AVERAGE atomic mass

What does AMU stand for?

Atomic Mass Unit

What is AMU based off of?

Carbon-12

Why is AMU based on Carbon-12

stable, easy to handle, abundant in nature

What is a neutral atom?

Equal protons and electrons, no net electric charge

Which subatomic particle is most massive?

Neutrons

Which subatomic particle is least massive?

Electrons

Can atomic number be found on the periodic table?

Atomic number can be found on periodic table

Can atomic number be used to determine the identity of an atom?

Atomic number can used to determine the identity of an atom

Is an atomic number always the same for an element?

Atomic number is always the same for an element

Can mass number be used to determine the number of neutrons?

Mass number can be used to determine the number of neutrons

Does mass number include the mass of particles with negligible mass?

Mass number does not include the mass of particles with negligible mass

Do Isotopes have the same number of protons?

Isotopes have the same number of protons

Do Isotopes have different masses?

Isotopes have different masses

What can Isotopes be distinguished by?

Isotopes can be distinguished by mass number.

Do Isotopes have the same number of electrons?

Isotopes have the same number of electrons

Do Isotopes react chemically the same way?

Isotopes react chemically the same way

What does the nucleus of an atom contain

contains all of the protons and neutrons

What takes up most of the volume of an atom?

electrons takes up most of the volume

What takes up most of the mass of an atom?

the nucleus takes up most of the mass

Is the nucleus involved in chemical reactions and bonding?

is not involved in chemical reactions and bonding

Is the nucleus very dense and positively charged

is very dense and positively charged

When nuclide is mention, what does that mean the element is?

an isotope