Atoms
what is an electron?
This particle has a negative charge.
What is an anion ?
An atm that gains an electron becomes this type of ion.
What is the number of neutrons?
Isotopes of an element differ in this particle.
What ae alkali metals ?
The elements in Group 1 are called this.
What is an atom ?
The smallest unit of matter that keeps its identity.
What is the nucleus?
The center of the atom is called this
what is an cation ?
An atom that loses electrons becomes this type of ion.
What are isotopes of carbon ?
Carbon-12 and Carbon-14 are examples of this.
What are halogens ?
The elements in Group 17 are known as this.
What is an isotope?
An atom of the same element with a different umber of neutrons.
What is the proton?
This subatomic particle determines the element identity.
What is Na?
Sodium typically forms this ion.
What are protons?
The atomic number of an isotope always equals the number of these
What are noble gases?
Group 18 elements are very stable and rarely react.
What is 2?
The charge of a magnesium ion.
What is the mass number?
The number of protons plus neutrons gives you this.
What is an ionic bond ?
This force holds positive and negative ions together.
What is a radioactive isotope.
This type of isotope is unstable and breaks down over time.
What are alkaline earth metals?
Calcium belongs to this group
What is 8?
The number of protons in oxygen.
What is the electron cloud model ?
The model that describes electrons as being in “ clouds “ instead of fixed paths.
What is 3?
What is the charge of an ion with 15 protons and 18 electrons ?
What is 35?
A neutral isotope of chlorine has 17 protons and 18 neutrons. What is its mass number?
What are transitions metals.
The d-block elements in the center of the table are called this
What are valence electrons?
The term for electrons in the outermost shell of an atom.