Everything Chem

Positive and negative charges attract each other that

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: s formed from protons and neutrons) • Protons- Positive Charge (+1) and a mass of 1 amu • Neutrons- Neutral particles, mass 1 amu • Electrons- (e- , particles carrying one negative charge (- 1), amu of 1/2000 The number of protons is equal to the number of electrons, so the overall charge is zero. Positive and negative charges attract each other, that is why electrons are “bound” to the nucleus Chapter 1.4 Atomic Number, mass number, isotopes • The number of electrons is determined by the number of protons in the nucleus. • The mass number (A) of an atom is obtained, A=number of protons + number of neutrons • To determine the number of protons Z is the number of protons • Number of neutrons is A- Z Isotopes – atoms that contains the same number of protons, but a different number of neutrons. These also share similar properties because they have the same number of electrons The mass of an element listed in the periodic table represents the weighted average of all its isotopes. Example for Cl: 34....
View Full Document

Ask a homework question - tutors are online