Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
vernon chem 3.1
Review of Chapter 3, Lesson 1
| Question | Answer |
|---|---|
| the basic particle from which all elements are made; the smallest particle of an element that has the properties of that element | atom |
| the average mass of all the isotopes of an element. | atomic mass |
| the number of protons in the nucleus of an atom (can be used to identify an element) | atomic number |
| a tiny, negatively charged particle that moves around the outside of the nucleus of an atom | electron |
| a substance that cannot be broken down into any other substances by chemical or physical means | element |
| a region of an atom in which electrons of the same energy are likely to be found | energy level |
| an atom with the same number of protons and a different number of neutrons from other atoms of the same element | isotope |
| a small particle in the nucleus of the atom, with no electrical charge. | neutron |
| the central core of an atom which contains protons and neutrons | nucleus |
| small, positively charged particles that are found in the nucleus of an atom | protons |
| Which atomic model proposed that atoms were shaped like hard spheres that could not be divided? | Dalton's |
| Which atomic model was the first to propose that atoms had negatively and positively charged parts? His model described electrons scattered throughout a ball of positive charge. | Thomson's |
| Which atomic model proposed that the majority of an atom's volume was empty space and all of the positive charge is concentrated in the nucleus of the atom? | Rutherford's |
| Which atomic model proposed that electrons were found only in specific orbits around the nucleus? | Bohr's |
| Which atomic model was developed in the 1920s and stated that electrons move rapidly within a cloudlike region around the nucleus? | Cloud Model |
| This scientist proposed the existence of another particle in the nucleus in 1932. The particle was called the neutron and had not been found sooner because it has no electrical charge | Chadwick |
| Which atomic model is currently still in use today? | Modern Model |
| What charge does a proton have? | positive |
| What charge does an electron have? | negative |
| The positive charge from the protons equal the negative charge of the electrons, therefore the atom itself is..... | neutral |
| Is a proton MORE or LESS massive than an electron? | more |
| How many electrons equal the mass of one proton? | 1,840 |
| What unit of mass do scientists sometimes use to describe the mass of an atom and its particles? | amu |
| What does amu stand for? | atomic mass units |
| every atom of an element has the same number of ____________ in its nucleus. | protons |
| The number of protons in the nucleus of an atom are equal to the number of electrons surrounding the nucleus. True or False? | True |
| Two different elements can have the same atomic number. True or False? | False |
| In order to find how many neutrons are in an isotope, subtract the number of protons from the elements atomic .......... | mass |
| protons + neutrons = | mass number |
| An object used to help explain ideas about the natural world when they cannot be observed directly | model |
Created by:
rozziebobble