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
science questions
Chapter 17 questions
| Question | Answer |
|---|---|
| 90 of the elements in the periodic table are ______. the others are man-made(synthetic) in labortories. | occur naturally |
| What are the 5 most common things that make up living things? | oxygen, carbon, hydrogen, nitrogen, and calcium |
| What is the lightest element in the periodic table? | Hydrogen |
| Atoms moves fastest in... | gases |
| Who had the first idea of atoms? | the Greeks |
| Whats the Brownian Motion? | its the constant jiggling of particles just large enough to be seen; evidence that atoms exsist from the motion or neighboring atoms and molecules. They bump into the larger particles we can see |
| What consists of two or more atoms that bond together by sharing electrons? | molecules |
| Whats the difference between atoms and molecules? | atoms are single pieces and molecules and two or more atoms |
| H2O is a ... | compound |
| A substance that is made of atoms of different elements combined together is a... | compound |
| What does a chemical formual show? | it shows the symbols of elements presents and the number of atoms of each element |
| What kind of particles and their charges are nucleons? | protons (positive) and neutrons (neutral) |
| What is the atomic number? | the number of protons; how the elements are arragned on the periodic table |
| what is an example of an isotope? | C-14, the most common is C-12 |
| Isotopes have the __________ as a regular atom but a different ______________. | atomic number; mass number |
| Isotopes have the same number of _______________ as a regualar atom and a different number of ___________________. | protons; neutrons |
| What is the nucleus made of? | (nucleons) protons neutrons |
| What charge does electrons have? | negative charge |
| When an atom no longer has the same amount of protons and electrons, what does the atom become? | an ion |
| How many electons can the 1 shell hold? | 2 electrons |
| The second shell can hold up to ________ electrons | 8 |
| how many eletrons can the outer shell hold? | no more than 8 |
| What is a covalent bond? | when 2 atoms share electrons from the outer shell; (co-share; valent- outershell)(connect together) |
| What is an ionic bond? | when electrons are transferred between atoms; when the electrons transfer they become ions (give away and arent connected) |
| What does a column show on the periodic table? | how many outer electrons that are the elements in that column... example...Li is in the first collumn so it has ONE electron on the outershell |
| What are the 3 most common phases of matter? | solid, liquid, gas |
| What phase of matter only exsists in very very high temperatures? | plasma |
| Where can plasma most commonly be found | in the stars |
| freezing point | 0 C |
| melting point | 0 C |
| boiling point | 100 C |
Created by:
tagne1
Popular Physics sets