190851
| Questão | Responda |
| What makes up an atom? | The nucleus, electrons, |
| What is does the nucleus consist of? | Protons and neutrons. |
| What are the charges for protons and electrons and neutrons? | Protons - positive Neutrons - neutral Electrons - negative |
| What do electrons do? | They move around the nucleus in circles. |
| What is the weight of electrons? | Virtually no mass |
| Is the number of neutrons the same as protons? | usually yes, but not always the same |
| The number of ........... equals the number of ........? | The number of Protons Equals Number of Electrons |
| Describe: Protons, Neutrons,and Electrons | Protons are heavy and positively charged. Neutrons are heavy and neutral. Electrons are tiny and negatively charged |
| What are the Electron shell rules? 1), 2),3),4), 5). | 1) Electrons always occupy shells (sometimes referred to as energy levels). 2) The LOWEST energy levels are always filled first -- these are the ones closest to the nucleus. 3) Only a certain number of electrons are allowed in each shell: 1st shell: 2, 2nd shell:8, 3rd shell: 8. 4) Atoms are much HAPPIER when they have FULL electron shells. 5) In most atoms the OUTER shell is NOT full and this makes the atom want to react. |
| What do you use the Electron shell rules to work out? | Electronic Configurations |
| Elements consist of One type of.... what? | ATOM! duuh |
| Does each element has the same or different number of protons? | DIFFERENT |
| Each element has a what numbers? A + M | Atomic and Mass number |
| What is the atomic number ? | How many protons there are in an atom. (THE SMALL NUMBER AT THE BOTTOM) |
| What else does the atomic number show? | The number of electrons there are. |
| What is the mass number? | The total number of protons and nuetrons... (THE BIG NUMBER AT THE TOP) |
| How do you find the number of neutrons in an atom? | Subtract the ATOMIC number from the MASS number. |
| NOTE : the mass number is roughly double the atomic number, because there's the same number of neutrons as protons in any nucleus. | YAAAY! |
| What is an isotope? | The same element with the exception of an extra NEUTRON or two. |
| What is relative Atomic Mass? | It is the average mass of the isotopes of an element. |
| Who was it who began to notice periodic patterns in the properties of the elements? | Dmitri Mendeleev |
| How many known elements are there in the periodic table | 100 |
| How is the periodic table arranged? | In Periods and Groups |
| What are Periods? | Rows in the table... The elements are arranged in order of increasing atomic number along each row. (the periodic number is the same as the number of electron shells.) |
| What are groups? | The columns of the table. (the same number of electrons in their outer shell). |
| What is the protons and neutrons made up of? | Quarks?!? - Not quacks |
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