The three particles* that make up the atom.
*Hint: Also known as subatomic particles
What are protons, neutrons, and electrons?
100
Make up protons and neutrons. (2 types of particles)
What are quarks held together by gluons?
100
The unit atomic mass is measured in.
What are AMU's?
100
The atomic mass is the only thing that is different. It remains the same element.
What are isotopes?
100
Organized by _______.
What is atomic number?
200
Charges are negative, neutral, and positive. (List in this order when answering)
What are electrons, neutrons, and protons?
200
The number of protons in the nucleus.
What is atomic number?
200
Electrons in the outermost energy level.
What are valence electrons?
200
You remove three electrons from an atom. The ____ _________ is now +3.
What is net charge?
200
Have similar characteristics.
What are groups/columns?
300
Found in the nucleus.
What are neutrons and protons?
300
Every atom of a given element has the same number of _____.
What are protons?
300
The number of electrons the fifth shell can hold.
What are 32 electrons?
300
Radioactive atoms.
What are stable atoms.
300
Mendeleev's periodic table was organized by _______
What is atomic mass?
400
Electrons move around in the _______ at different ______ ____.
What are clouds;energy levels?
400
The number of protons equals the number of electrons.
What is a neutral atom?
400
Adding a proton to an atom.
What is changing elements?
400
The average ______ of all that element's isotopes.
What is the atomic mass for the neutral atom?
400
Elements on the left side of the period are _______, elements in the center are relatively unreactive metals, elements at the right ends of the period are very _____.
What is highly reactive; very unreactive?
500
Is most of the atom.
What is empty space/electron cloud?
500
The number of ______ determines whether an atom is an isotope.
What are neutrons?
500
The atomic number is 8, the atomic mass is 16 amu, there are ______ valence electrons, and it is a neutral atom.