Essays Tagged: "number of protons"

Nuclear Power

the nucleus splits into Barium and Krypton; however, it can split into any two atoms as long as the number of protons equals the original amount of the protons found in the Uranium. In addition, a mas ...

(5 pages) 101 0 3.6 May/1996

Subjects: Science Essays > Physics

Bromine: History and Study

that I'm away from Chlorine, I can find myself, my inner "me." I know that they gave me the atomic number 35, which is the number of protons I have. I weigh a mere 79.904 atomic mass units, and my de ... ople do with me. First, you have to extract me form the stupid Chlorine atoms. Them I am used for a number of purposes. You often you me to disinfect water for pools, instead of Chlorine. Good idea. I ...

(2 pages) 24 0 3.0 Apr/2003

Subjects: Science Essays > Chemistry

Element Arsenic.

ArsenicNumber of Electrons, Protons, Neutrons, Symbol and NameName: ArsenicSymbol: AsNumber of Protons: 33N ... rotons, Neutrons, Symbol and NameName: ArsenicSymbol: AsNumber of Protons: 33Number of Electrons: 33Number of Neutrons: 42Melting Point: 817.0 °C (1090.15 °K, 1502.6 °F)Boiling Point: 613. ... rustal Abundance: 1.8 milligrams per kilogramEstimated Oceanic Abundance: 3.7-3 milligrams per literNumber of Stable Isotopes: 1Electron Shell Configuration: 1s22s2 2p63s2 3p6 3d104s2 4p3Elemental ars ...

(3 pages) 42 0 3.0 Apr/2003

Subjects: Science Essays > Chemistry

Describe and explain the periodic trends of the period 3 elements Na - Ar

graph shows that atomic radius decreases across a period (from left to right). This is because the number of protons in the nucleus increases so the nuclear charge increases. The force of attraction ... --- M+(g) + e-First ionisation energy increases across a period because going across the period the number of protons in the nucleus increases so the nuclear charge in each element increases therefore ...

(2 pages) 44 0 3.0 Jan/2004

Subjects: Science Essays > Chemistry

What is radioactivity?

Protons and neutrons are, in turn, composed of quarks.IsotopesAll atoms with nuclei having the same number of protons form a chemical element. Having the same number of protons, they have the same num ... hey have the same number of electrons, hence the same chemical properties. When they have different numbers of neutrons, they are called "isotopes". Each isotope of a given element is designated by th ...

(1 pages) 40 2 4.3 Jun/2004

Subjects: Science Essays > Chemistry

Everything you need to know about a cell - definitions in outline form, interpretation of Honors Biology intro.

us- core of atom that accounts for almost all its mass; (-)electrons move rapidly around itd.atomic number- number of (+) protonse.mass number- number of protons and neutronsf.ion- an atom (or compoun ... t has gained or lost 1 or more electrons, thus is positive or negative in charge2.Isotopes- vary in number of neutronsa.radioactive isotopes- have unstable nuclei; breakdown over time3.Arrangement of ...

(6 pages) 59 1 4.0 Jan/2005

Subjects: Science Essays > Biology

The Biological importance of water

sharing electrons in the outer orbits of the quantum shells. In the case of water however the large number of protons in the oxygen nucleus have a stronger attraction for these shared electrons than t ... f another water molecule to form a weak hydrogen bond.The bonds are weak individually but the sheer number of them means that the total force keeping the molecules together is considerable.Diagram of ...

(6 pages) 55 0 4.3 Mar/2005

Subjects: Science Essays > Biology

Trends in the Periodic Table: ionisation energy, electronegativity, atomic radius, melting and boling poins

ion.Electronegativity is the relative power to attract electrons.- Increases across a period as the number of protons increases so does the positive charge of the nucleus, thus a stronger attraction a ... negatively charged electrons repel each other and the 'invaders'. The more protons, the greater the number of occupied electron shells that shield the nucleus.- Fluorine is the most electronegative el ...

(1 pages) 3455 0 3.0 Jun/2005

Subjects: Science Essays > Chemistry

Ap Biology notes.

ctive isotope 32P hasAnswer - b - one more neutron4) Atoms can be represented by simply listing the number of protons, neutrons, and electrons - for example, 2P+; 2n0; 2e- for helium. Which atom repre ... e can be sure that a mole of table sugar and a mole of vitamin C are in equal in their:Answer - c - number of molecules.8) How many grams of acetic acid (C2H4O2) would you use to make 10L of a 0.1 M a ...

(4 pages) 40 0 3.7 Sep/2005

Subjects: Science Essays > Biology

Science: 8th Grade Study Guide

takes up spaceElement: matter made up of one type of atomPeriodic Table: organizes elements by the number of protons in each elements nucleusTypes of Matter:Mixture Element CompoundHow fast is "fast" ...

(4 pages) 32 0 4.5 Mar/2006

Subjects: Science Essays > Earth Sciences

Isotopes in Society: Xenon

An isotope is an atom which is related to an element by the number of protons in the nucleus, and differs by the number of neutrons. Thus, they vary in physical ... te a great change in the atomic mass of an element.Every element which has been founded has various numbers of isotopes, which all differ, and can be used for different purposes. There are approximate ... olitically, culturally, environmentally, socially, and ethically.Xenon is an element with an atomic number of 54, which has 29 isotopes, of which one of them is called Xenon-135. This is a radioactive ...

(4 pages) 29 0 4.2 Mar/2006

Subjects: Science Essays > Earth Sciences

Chemestry Notes: - development of periodic table, organization of elements, atomic structure, and modern periodic table, isotopes, summary of chapter

1.1 The development of the periodic tableAtomic number: the number of positive charges or protons in the nucleus of an atom of a given element, and ... of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus.Atomic Mass: the mass of an isotope of an eleme ... the carbon-12 atom.Isotope: either of two or more forms of a chemical element with the same atomic number but different numbers of neutrons.Mass number: the number of protons and neutrons in the nucl ...

(3 pages) 18 0 0.0 Oct/2006

Subjects: Science Essays > Chemistry

Basic Chemistry Study Notes

cated outside the nucleusHave a negative charge (1-)Have a relative mass of 1/2000DefinitionsAtomic Number:The number of protons in an atomDetermines the identity of the atomAtoms are typically neutra ... e identity of the atomAtoms are typically neutral, in this instance you can use it to determine the number of electronsMass Number:Sum of protons and neutrons in an atomSome isotopes occur in greater ...

(4 pages) 35 1 4.5 Apr/2007

Subjects: Science Essays > Chemistry