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Atoms,Elements Vocab
questions and vocab.
| Question | Answer |
|---|---|
| most common substances in the universe are? | 1. Hydrogen 2. Helium 3. Oxygen 4. Carbon |
| 99% of the mass of a human body are made up of (3)` | 1. Oxygen 2. Carbon 3. Hydrogen |
| Most common elements in earths crust? | 1. Oxygen 2. Silicon 3. Aluminum 4. Iron |
| composition of air and their symbols | Nitrogen N2-Oxygen O2-Argon Ar- Carbon dioxide CO2 |
| In order what is shown on an element key? | 1. atomic number 2. element symbol 3. Element name 4. atomic mass |
| a____ is involved in the transfer or sharing of electrons | valence electrons |
| a_______is a positevely cahrged particle in the nucleus | proton |
| an elements_______is its row in the periodic table | period |
| the central core of an atom is called its | nucleus |
| a______carries a negative electral charge, and is located outside an atoms central core | electron |
| Mendeleev was the first to arrrange the elements according to their _________ in the periodic table of elements | properties |
| Elements in a _______ or ________ of the periodic table have similar characteristics | family or group |
| a _____ is a particle in the nucleus that has no charge | neutron |
| Scientists use the __________to measure the mass of the particles within the atom | atomic mass unit |
| What did Dmitri Mendeleev reconize in 1869? | he reconized a hidden pattern within the elements |
| What is the atomic mass of an element? | all the isotoypes in the element |
| when do patterns appear in the periodc table of elements? | when arranged in increasing atomic mass |
| what does the word periodic mean? | regular repeated pattern |
| what are the three basic parts of an atom | protons, neutrons and electrons |
| what does the nucleus contain? | protons and neutrons |
| e- | electron |
| p | proton |
| n | neutron |
| anything that has weight and takes up space | matter |
| a basic substance | element |
| the "building blocks" of matter | atoms |
| particles inside the nucleus | protons ans neutrons |
| the number of protons in a nucleus | atomic number |
| terms that refer to the elements in a column of the periodic table | family and group |
| elements in each group have | similiar characteristics |
| an atom is made up of smaller particles called | subatomic particles |
| what do we call the smallest unit of an element? | an atom |
| What are electrons? | tiny subatomic particles that swarm around the atoms nucleus |
| what does subatomic mean? | smaller than an atom |
| what kind of electrical Charge do electrons have? | negative |
| what kind of electrical charge do neutrons have? | none |
| what is a molecule? | two or more atoms bound together |
| what is the periodic table? | a table defining all elements |
| the word atom comes from an ancient greek word meaning | tiny |
| where can you find the electrons in an atom? | swarming around the nucleus in distinct orbits called shells |
| about how big is an atom? | one ten-millionth of a millimeter |
| how are elctrons arranged in an atom? | in energy levels |
| where is most of the atoms mass? | In the nucleus |
| which scientist is credited with discovering the atom? | j.j. thompson |
Created by:
amanda:)
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