Atoms & Elements
This is the positively charged particle found in the nucleus of an atom.
What is a proton?
This is the chemical formula for water.
What is H₂O?
Most atoms bond to achieve this many electrons in their outer shell (except hydrogen).
What is 8?
The vertical columns on the periodic table, also called groups, that contain elements with similar properties.
What are families?
This particle, found outside the nucleus, has a negative charge.
What is an electron?
This number, unique to each element, tells you the number of protons in its nucleus.
What is the atomic number?
A molecule is formed when atoms do this.
What is bond (or form chemical bonds)?
This type of bond involves the sharing of electrons between nonmetals.
What is a covalent bond?
This highly reactive family has 7 valence electrons and is in Group 17.
What are the halogens?
This type of bond is characteristic of metals, where electrons are shared freely among many atoms.
What is a metallic bond?
The central part of an atom, containing protons and neutrons.
What is the nucleus?
This term describes a molecule made of two or more different elements.
What is a compound?
The energy change that occurs when a chemical bond is formed. Think magnets coming together.
What is energy is released?
This family, which includes sodium, wants to lose 1 electron and reacts violently with water.
What are the alkali metals?
The name of the family known for its bright colors and use in jewelry, which is found in the middle of the table (Groups 3-12).
What are the transition metals?
A pure substance made of only one type of atom.
What is an element?
The molecule O₂ is an example of what?
What is a molecule?
This type of bond results from the transfer of electrons from a metal to a nonmetal.
What is an ionic bond?
This family of elements is in Group 18 and is famously unreactive.
What are the noble gases?
The process of breaking a chemical bond always does this to energy.
What is requires (or absorbs) energy?
The number of protons in an atom of carbon.
What is 6?
O₂ is a molecule but not a compound because it is made of atoms of only one of these.
What is an element?
Hydrogen is an exception to the octet rule because its outer shell is full with only this many electrons.
What is 2?
Elements in the same group have similar chemical properties because they have the same number of these particles
What are electrons?
This is the fundamental difference between a molecule like O₂ and a compound like CO₂.
What is a compound contains different elements, while O₂ is only one type of element?