Summary Atomic Structure

University:
Augusta University
Course:
CHEM 4551 | Biochemistry I: Physical Biochemistry
Academic year:

2023
Views:

200

Pages:

1
Author:

C. Jenifer

Summary Atomic Structure 1. Theory atom Dalton based on three assumption tree, that is: a. Every element chemistry arranged by particles small Which No can destroyed and separated Which called atom. During experience change chemistry, atom No Can created And annihilated. b. All atom from something element have mass And characteristic Which The same, but atom- atom from something element different with atoms from element Which other, Good massnor its properties Which different. c. In chemical compounds, atoms of different elements bond with comparison number simple. 2. Thompson's atomic model is analogous to a raisin bread, in which atoms are composed on material charged positive And in inside spread electron like raisins in raisin bread. Because positive and negative charges are mixed together by quantity Which The same, so in a way whole atom according to Thompson nature neutral. 3. Model atom Rutherford state that: a. Atom arranged from core atom Which charged positive, And electrons charged negative Which surround core. b. All proton collected in core atom, And cause core atom chargedpositive. c. Part big volume atom is room blank. Almost all mass atomcentralized on core atom Which very small. Fingers atom around 10 –10 m, whereasfingers core atom around 10 –15 m. d. The number of protons in the nucleus is equal to the number of electrons surrounding the nucleus, whereas atom nature neutral. 4. Model atom Bohr analogized like A system Sun mini. On system Sun, planet- planets circulating surround sun, whereas on atom, electrons circulating surround atom, only the difference on system system Sun every trajectory (orbit) only1 planet is occupied, whereas in each atom each path (shell) can be occupied by morefrom 1 electron. 5. Particle base compiler atom is proton ,electron, And neutrons. 6. Connection between number atom, mass atom, And amount neutrons is: Number atom (Z) = amount proton = amount electron Mass atom ( A ) = amount proton + neutrons Amount neutrons = A – Z 7. Isotopes are atoms of the same element, but with different masses. Mass difference due to differences in the number of neutrons. Atoms of the same element can have different number of neutrons. Isobars are atoms of different elements, but have the same mass number. Isotones are atoms of different elements, but have amount neutrons The same.