Atom Review

Atom Review1The smallest part of an element that retains the properties of the element is the ?atomProtons have a ___Charge?positiveNeutrons have a _ charge?Neutral/ no chargeElectrons have a _ charge?negativeWhat is found in the nucleus?Protons and neutronsWhere are electrons found?In the shells surrounding the nucleus.What is the magic # for the electron shells?

Bonus points: +5: what are the other shell numbers?2,8,8 for the 1st 18.

2, 8, 18, 32,50, 72

Which part of the atom has a negative charge?electronsThe charge of the nucleus of an atom is due to the presence of Positive protonsHow many neutrons for the atom of Mercury?121

201-80 121What subatomic particle is not found in the nucleus?The electronsWhen determining an elements identity, what is the MOST important subatomic part to examine?protonsMOST of the volume of an atom is occupied by-Empty spaceHow many protons would an atom of chlorine have?17 same as the atomic #If you have many models of an atom, how do you determine which one has the lowest mass? By counting all of the protons and neutrons. Find the mass of this atom. 23 P 15 N38

23+15= 38

How do you find the valence electrons? Count the electrons on the outer most shell. Describe a neutronNo chargeAbout same mass as a protonWhat is the charge of an atoms nucleus if it has 17 protons, 20 neutrons, and 17 electrons + 17 protonsNeils Bohr is credited for his work with?Developing the model of an atom as a build up of successive orbital shells of electrons. The model we use today. Draw the atom of Magnesium 12 Mg 2412 P, 12 N, 12 E 2 e, 8 e, 2 e in last shell