Possesses more protons than electrons Possesses more electrons than protons Equal numbers of protons and electrons Charged Objects as an Imbalance of Protons and Electrons In the previous section of Lesson 1an atom was described as being a small and dense core of positively charged protons and neutral neutrons surrounded by shells of negatively charged electrons. The protons are tightly bound within the nucleus and not removable by ordinary measures. While the electrons are attracted to the protons of the nucleus, the addition of energy to an atom can persuade the electrons to leave an atom. Similarly, electrons within atoms of other materials can be persuaded to leave their own electron shells and become members of the electrons shells of other atoms of different materials.
Kids Science Glossary, Dictionary and Terms Science Dictionary, Glossary and Terms Corrosive - Is the wearing away of the surface of a metal by chemical reactions with oxygen and water. When a metal reacts with substances around it, such as water or air, it corrodes.
Many transition metals corrode slowly, if at all, but iron and steel corrode quickly. The corrosion of iron and steel mixed with water and air oxygen is called rusting. Rusting damages metal parts so it is important to prevent it.
A Absorbent - a substance that can soak up a liquid, or to take in energy and retain it. Absorber - an absorber does not reflect or transmit particles or radiation that hit it.
Aluminium foil is an absorber of alpha particles. A dark, dull surface is an absorber of infra-red radiation.
Accuracy - is a term that refers to the properties of a measuring instrument. Acid - an acid is a chemical that will neutralize a base such as an alkali. There are many different kinds of acid. Lemons are sour because they contain citric acid. Acid in vinegar is called acetic acid.
It is a substance that disolves in water to form a solution with a pH below 7. An acid contains hydrogen which can be replaced by a metal to form a salt. A strong acid completely ionises in water and a weak acid only partly ionises.
Sulphur and nitrogen oxides are produced from the burning of fossil fuels. When they escape into the atmosphe, they form sulphuric and nitric acids. Thes acids can have effects on our environment, e. Adhesive - made to stick like glue.
Air - is a mixture of gases. Alkali - is a metal oxide or hydroxide base that dissolves in water to form a solution with a pH greater than 7. An alkali is neutralised by an acid to form a salt and water. Alloy - is a metal made by melting and mixing two or more metals together, e.
Amphibians - are animals that live in water and on land. They have smooth, moist skins and lay their eggs in water. Antennae - a pair of sensory organs found on the heads of insects.
Apparatus - are the things equipment needed to carry out an experiment. Aquatic - belonging toor living in water. Atomic - an atom is the smallest particle unit of matter of an element which can exist and be part of a chemical reaction a source of nuclear energy.
The tiniest part of a substance.
Atomic is the use of atomic bombs or energy. Barbule - branches that form from the hollow shaft Rachis of a feather. When birds preen groom their feathers they spread oils over them which 're-hooks' the barbules.
Battery - a battery consists of a number of electrical cells. These cells are usually connected in series to give a highter voltage than that from a sinlge cell. Bedrock - solid rock immediatley beneath the surface soil. Biodegradable - is a material that can rot and decay away quickly after we have used it.
Biologist - to study biology you will need to know the 7 life processes. M - Movement - the moving parts of an organism R - Reproduction - Producing offspring S - Sensitivity - Reacting and responding to the environment G - Growth - Increasing is size to adulthood R - Respiration - Turning food into energy E - Excretion - Getting rid of waste N - Nutrition - Getting food to stay alive Birds - are animals that have feather and wings.
They lay eggs with hard shells and usually fly. Bonded - Something that is bound, fastened or joined together.Negatively charged subatomic particles that have almost no mass are called: A.
electrons. When atoms gain or lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as Chapter-2 The Nature of Molecules and Properties of Water.
70 terms. Fig. 2 POSITIVE OBJECT MAKES GROUNDED NEEDLE SPEW CHARGED WIND.
Next, negative electrons from the plasma stick to neutral air molecules, making them negative. Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons.
The electrostatic attraction between the positives and negatives brings the particles together and creates an ionic compound, such as sodium chloride.
Charged Negatively. There are 11 electrons and 10 protons. This results in an imbalance of charge.
With more electrons than protons, the particle is negatively charged. b. Uncharged. There are 11 electrons and 11 protons.
This results in a balance of charge. This particle is neutral or uncharged. During his subsequent studies, Professor Lichtenberg used various high voltage electrostatic devices to electrically charge the surfaces of various insulating materials including resin, glass, and ebonite (hard rubber).
He then sprinkled mixtures of finely powdered sulfur (yellow) and minium ("red lead", or lead tetroxide) onto the charged surface.
A process where toxic or other hazardous substances are removed from a liquid or gas. Examples include removing copper particles from CMP slurry or converting liquid or gaseous toxic effluents into safe forms for disposal.