Atoms Atom is the fundamental building block of all stuff‚ or what scientists like to call "matter". An individual atom is very small. In fact‚ the smallest type of atom‚ hydrogen‚ has a diameter of 10-8 cm. Every single object is composed of atoms. Our body is made up of many‚ many individual atoms. There are also many different types of atom. These different types are called elements. Examples of some elements are hydrogen‚ oxygen‚ and helium. Under normal conditions many atoms can stick together
Premium Atom Electric charge Electron
The picture above shows a typical gel electrophoresis set up. The clear container in the center of the picture is called a gel electrophoresis chamber. It contains the agarose gel that will be loaded with genetic material‚ as well as a buffer solution. It is connected to a DC power supply via electrodes. This picture was taken at Paw Print Genetics laboratory in Spokane‚ Washington. Viney and Fenton (1998) defined the term electrophoresis as‚ “the migration of charged particles through a static medium
Premium Electric charge Electromagnetism Electron
de-broglie wavelength ? a )α-parhcle b ) proton c ) β-particle d ) neutron 4. Dual character of an electron was explained by………. a ) Bohr b ) Heisenbery c ) de-brogle d ) pauli 5. The hybridization in SF6 molecule is………….. a ) SP3 b ) SP3d c ) SP3d2 d ) SP3 d3 6. The enery by an electron in an atom is given by En =………….. a ) -4π2me4n2h2 b ) -2π2me2n2h2 c ) -2π2me4n2h2
Premium Atom Hydrogen Oxygen
QUESTION If copper (II) sulfate when mixed with sodium carbonate at different quantities combine to form ions in definite ratios. HYPOTHESIS / PREDICTION I believe that the ions will combine in definite ratios due to the fact that the valance electrons will not be changing throughout any chemicals; consequently the ions must combine in definite ratios. EXPERIMENTAL DESIGN A technique is performed in which copper (II) sulfate and sodium carbonate are placed together in various test tubes‚ with
Premium Chemistry Ratio Chemical reaction
electrostatic force between two charges of 200 µC and 500 µC placed in free space is 5 gf. Find the distance between the two charges. (g = 10 m/s2) 12. Derive an expression for the electric current in terms of drift velocity. How the drift velocity of the electron depends on the temperature of
Premium Magnetic field Electron Electric charge
to say that H2O has a “covalent bond”‚ let’s look at the definition of a covalent bond: A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. The stable balance of attractive and repulsive forces between atoms when they share electrons is known as covalent bonding. For many molecules‚ the sharing of electrons allows each atom to attain the equivalent of a full outer shell‚ corresponding to a stable electronic configuration. (Source: http://en.wikipedia.org/wiki/Covalent_bond)
Premium Atom Covalent bond Electron
inserted into glass tubing using a thin pipe then the pipe is quickly removed‚ and the glass is fused at the end. The neon tube produces the light when an electrical current bombards the gas atoms with electrons knocking neon atoms out of orbit. As a result‚ Electrons collide with other electrons thus causing light. Neon is a colorless‚ tasteless‚ and odorless gas. It’s symbol is Ne‚ and it’s atomic number is 10 on the periodic table. The atomic mass of neon is 20.179. But wait! There’s more. You
Premium Atom Neutron Electron
learn more about them. I learned that neutrinos are subatomic particles with a zero charges and very little mass. There are three types of neutrinos: electron‚ muon and tau. The idea that neutrinos exist was proposed by Wolfgang Pauli. He proposed that there were more than two particles involved in an explosion‚ that along with protons and electrons‚ that a third‚ the neutron‚ was also involved. He stated that energy and momentum did not seem to be conserved in radioactive decays. Pauli proposed
Premium Electron Particle physics Neutron
Unit C2‚ C2.2.3 Covalent structures 1. This drill contains an electric motor. The diagram below shows the main parts of an electric motor. The carbon contacts are made of graphite. Springs push the contacts against the copper ring. The contacts conduct electricity to the copper ring. The copper ring rotates rapidly but does not stick or become worn because the graphite is soft and slippery. Graphite has properties which are ideal for making the contacts in an electric motor. Explain
Premium Carbon Atom Carbon dioxide
investigate how atoms’ electronegativity value affects the bonds they produce. When two atoms bond‚ a pair of electrons is shared between atoms. Electronegativity is a measure of a single atom’s ability to hoard electrons shared in that bond. In this lab you will work diligently‚ at your own pace‚ to answer a number of questions. To begin‚ from what you’ve already learned about the protons and electrons in an atom‚ what would cause an atom to have a high electronegativity value? _______________________________________________________________________
Premium Atom Chemical polarity Chemical bond