c101_f10_1004 - Review Molecule: more than one atom, e.g.,...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Review Molecule : more than one atom, e.g., O 2 , H 2 , CO, H 2 O. Compound : more than one kind of atom in a fixed ratio, e.g., H 2 O, CO, etc. Not all molecules are compounds, e.g., O 2 . Not all compounds are molecules because solid compounds have a distinct type of bonding, e.g., NaCl. Chemical transformations involve forming new combinations of atoms in whole-number ratios, e.g., H 2 O = 2 H : 1 O. Atoms are conserved in chemical and physical transformations. 2 H 2 + O 2 2 H 2 O
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemistry 101 Fall 2010 Atomic structure and isotopes in Chapter 2 An atom is composed of a tiny, dense, positive nucleus surrounded by a gigantic cloud of electrons (a pea surrounded by a sports stadium). Although the nucleus fills a tiny space at the center of an atom, the nucleus has nearly all the mass of the atom. The nucleus can contain protons and neutrons, so the mass number of an atom has been defined as the number of protons and neutrons. The mass number is given the symbol A:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/05/2011 for the course CHEM 101 taught by Professor Scottnickolaisen during the Fall '11 term at California State University Los Angeles .

Page1 / 9

c101_f10_1004 - Review Molecule: more than one atom, e.g.,...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online