Question | Answer |
How many different elements with different properties are there? | 112 |
Element | a material that cannot be broken down into anything simpler than a chemical reaction. |
Water is made up of the elements -------- and ------. Neither of these 2 elements can be broken down into simpler substances. | Hydrogen and Oxygen |
Most elements are ________,some are _______,and a few are liquids at room temperature. | Solids,gasses |
Metals | elements that share common properties like shiny,luster,conductivity,and flexibility. |
Nonmetals | elements that are dull,poor conductors of electricity,and brittle |
Atom | the smallest unit of an element that contains particles of that element |
Elements are made up of tiny ___________. | particles |
Metalloids | elements with properties in between metals and nonmetals |
A material that cannot be broken down easily by a chemical reaction is an ___________. | Element |
There are over _______+ known elements. | 117 |
Elements combined with other elements to form a new substance are ___________ ___________. | Chemically Reactive |
Atomic Mass | the sum of protons and neutrons |
Molecule | two or more of the same atoms linked together by their electrons |
Molecules form when they are linked together by their ______________________. | Electrons |
Combining letters and numbers together to describe molecules are __________ ____________ | Chemical Formulas |
Elements that are liquid at room temperature are?? | bromine and mercury |
What do scientists use to magnify atoms? | An electron microscope |
Electron Microscopes use ________ instead of light particles. | electrons |
An elements name is determined by the number of ___________ and nothing else. | protons |