Chemistry

metals - Answer are good conductors of heat and electricity patterns in the properties of elements - Answer Each scientist accredited for helping to develop the periodic table had a different way of arranging the elements but they all used______________________________ as a basis for their organizational method core - Answer __________ electrons experience a greater force of attraction to the nucleus B - Answer Which of the following elements would form an ion with a +3 charge? Options: Na...

Sig fig addition rule - Answer The least accurate number place Sig Fig Multiplication/Division Rule - Answer least number of sig figs net ionic equation - Answer an equation for a reaction in solution showing only those particles that are directly involved in the chemical change oxidation number - Answer Positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable micro - Answer 10^-6 nano - Answer 10^-9 % yield - Answer actual yield/...

Matter - Answer Anything that has mass and takes up space Mass - Answer the amount of matter in an object Volume - Answer The amount of space an object takes up physical property - Answer A characteristic of a pure substance that can be observed without changing it into another substance chemical property - Answer A characteristic of a pure substance that describes its ability to change into different substances melting point - Answer the temperature at which a substance changes from a so...

John Newlands - Answer -arranged elements by increasing atomic mass -noticed the repetition of properties every eighth element -created the law of octaves Mendeleev - Answer -demonstrated a connection between atomic mass and elemental properties -arranged the elements in order of increasing atomic mass -predicted the existence and properties of undiscovered elements Moseley - Answer -Discovered that atoms contain a unique number of protons called the atomic number -Arranged elements in ...

A burning splint will burn more vigorously in pure oxygen than in air because____. A) oxygen is a reactant in combustion and concentration of oxygen is higher in pure oxygen than is in air B) oxygen is a catalyst for combustion C) oxygen is a product of combustion D) nitrogen is a product of combustion and the system reaches equilibrium at a lower temperature E) nitrogen is a reactant in combustion and its low concentration in pure oxygen catalyzes the combustion - Answer A) oxygen is a ...

Atomic model - Answer Representation of an atom showing its nucleus and orbiting electrons. Proton - Answer Positively charge subatomic particle found in the nucleus. Neutron - Answer neutrally subatomic particle found in the nucleus. electron - Answer negatively charged subatomic paticle found in orbit around the nucleus subatomic - Answer within the atom pure substance - Answer 1 consistent particle (1 formula throughout). Mixture - Answer Homeogenous mixtures - Answer same consistency...

Found in the nucleus of the atom - Answer protons and neutrons Found in the rings outside of the nucleus - Answer electrons How many electrons fit in the first ring? - Answer 2 Only 2 electrons fit in the 1st ring. How many fit in all the other rings? - Answer 8 What do you call the electrons in the outermost ring? - Answer valence electrons These are the rows (left - right) on the periodic table - Answer periods These are the columns (up and down) on the periodic table - Answer groUPs Va...

physical change - Answer any change that changes the form or appearance of a substance but does not change it into another substance chemical change - Answer when the atoms rearrange to form new substances Reactants - Answer substances that undergo the chemical changes Products - Answer the new substance that forms Precipitate - Answer a solid that forms from liquids during a chemical reaction Exothermic reaction - Answer the energy released as the products form is greater than the energy...

Change in energy, Production of a gas, Formations of a precipitate, Color change - Answer Four evidences of Chemical Reactions Precipitate - Answer A solid that settles out of a solution as the result of physical or chemical changes Color change - Answer A physical change that shows a reaction has occurred Chemical equation - Answer A model of a chemical reaction that shows the chemicals used (reactants) and the chemicals produced (products); Reactants - Answer Left hand side of the equat...

Group 1 - Answer Alkali metals. Group 2 - Answer Alkaline earth metals Groups 3-12 - Answer transition metals metalloids - Answer Found along the 'staircase'. Have properties of both metals and nonmetals nonmetals - Answer brittle , dull, poor conductors of heat and electricity Proton - Answer Positively charged particle in the nucleus of an atom Neutron - Answer A subatomic particle that is neutral and that is found in the nucleus of an atom Electron - Answer A tiny, negatively charg...