Electron Shells: Basics Shells The arrangement of electrons in an atom is called the?electronic?configuration Electrons are arranged around the nucleus in?principal energy levels?or?principal quant...
Isotopes: Basics Isotopes are atoms of the?same?element?that contain the same number of?protons?and electrons but a different number of?neutrons The symbol for an isotope is the?chemical?symbol?(or...
Atomic & Ionic Radius Atomic radius The?atomic?radius?of an element is a measure of the size of an atom It is?half?the distance between the two?nuclei?of two covalently bonded atoms of the same...
Determining the Subatomic Structure of Atoms & Ions An atom is?neutral?and has no overall charge Ions on the other hand are formed when atoms either?gain?or?lose?electrons, causing them to beco...
Mass & Charge Distribution The mass of an atom is?concentrated?in the nucleus, because the nucleus contains the heaviest subatomic particles (the neutrons and protons) The mass of the electron ...
Structure of an Atom All matter is composed of?atoms, which are the smallest parts of an element that can take place in?chemical reactions Atoms are mostly made up of?empty?space?around a very smal...
GMOs in Food: Social & Ethical Implications The genetic modification of microorganisms for the production of medicines, antibiotics and enzymes raises little debate compared to the use of genet...
Genetic Engineering: Use in Agriculture Genetic engineering is a technique used to deliberately modify a specific characteristic (or characteristics) of an organism The technique involves?removing ...
Social & Ethical Considerations The use of?gene technology?(genetic screening and gene therapy) in medicine is becoming more common Genetic screening in medicine is being used to: Allow people ...
Gene Therapy Gene therapy involves using various mechanisms to?alter a person's genetic material?to treat, or cure, diseases As scientists gain a better understanding of the human genome and theref...
Genetic Screening In certain circumstances (eg. in the pregnancy in an older woman, or pregnancy where there is a family history of a genetic disease) may require individuals to determine if they h...
我們現(xiàn)在比以往任何時(shí)代都更容易了解周圍世界，獲悉各種動(dòng)態(tài)，傳播各種信息。這所有的一切得益于傳媒行業(yè)的蓬勃發(fā)展。傳媒一直以來(lái)都是留學(xué)的熱門專業(yè)，中國(guó)學(xué)生最常選擇的目的地包括美國(guó)、英國(guó)、香港、韓國(guó)等。...
