Doncouse_Jeremy_Week2

Doncouse_Jeremy_Week2 - Running head: Chapter 2 1 Week 1...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Running head: Chapter 2 1 Week 1 Written Assignment: Chapter 2 Jeremy Doncouse Mountain State University
Background image of page 1

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

View Full DocumentRight Arrow Icon
Running head: Chapter 2 2 Chapter 2: Chemistry Comes Alive Composition of Matter: Atoms and Elements 1. Define chemical element and list the four elements that form the bulk of body matter. A chemical element is a unique substance that can’t be broken down into simpler means by ordinary chemical methods. The four most common elements to our body matter are: carbon, oxygen, hydrogen, and nitrogen. There are other elements present in the body but the four mentioned elements make up about 96% of our body weight. 2. Define atom. List the subatomic particles; describe their relative masses, charges, and positions in the atom. Atoms are the building blocks of the elements. Atoms are made up of protons, neutrons, and electrons. Protons are positively charges particles which have a mass of 1 amu. Neutrons have a neutral charge and also have a mass of 1 amu. Electrons are negatively charged and weight 1/2000 the mass of a proton and therefore are considered to have a mass of 0 amu. Neutrons and protons are located in the nucleus of the atom and are bound tightly together. Electrons are located outside the nucleus and orbit around it. 3. Define atomic number, atomic mass, atomic weight, isotope, and radioisotope. Atomic number refers to the number of protons in an atom (the number of neutrons equals the number of protons). Atomic mass equals the sum of the masses of an atom’s protons and neutrons. Atomic weight equals the average weight of all isotopes of an element according to their relative abundance in nature. Isotope of an atom is a different atomic structure with the same number of protons and electrons but with a different number of neutrons of the normal element. Radioisotope is an element whose atomic structure is not stable and whose structure decomposes to become more stable giving off radiation. Chemical Bonds 1. Explain the role of electrons in chemical bonding and in relation to the octet rule.
Background image of page 2
Running head: Chapter 2 3 Atoms are most stable with 8 electrons in their outer shell, known as the valence shell. Outer shells of atoms with less than 8 electrons want to either give up their electrons or accept more electrons. This principle allows chemical bonding to make the atoms more stable by balancing out their outer shells.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Doncouse_Jeremy_Week2 - Running head: Chapter 2 1 Week 1...

This preview shows document pages 1 - 4. Sign up to view the full document.

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