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LD Chemistry Quiz #2
LD Chemistry - Bohr Model & Electron Dot - Quiz #2
| Question | Answer |
|---|---|
| What are protons, electron and neutrons? | subatomic particles |
| Proton ( charge, location, relative mass in amu?) | positively charged, relative mass of 1 amu, in nucleus |
| Electron ( charge, location, relative mass in amu? | negatively charged, relative mass of 1/2000 or 2000 less massive then proton or neutron, located outside the nucleus. |
| Neutron ( charge,location, relative mass in amu?) | neutral subatomic particle, found in nucleus, mass exactlly as proton- approximately 1 amu |
| What is the atomic number? | number of protons in an atom of specific element |
| Atoms of different elements have ______________ of protons | different number |
| What is mass number? | sum of protons and neutrons in the nucleus of an atom |
| How do you calculate number of neutrons? | mass number - atomic number |
| What are isotopes? | atoms of the same element that have different number of neutrons and different mass number |
| What is the same for the isotopes of the same element? | atomic number ( number of protons) |
| What is this C- 14? | isotopic notation for the isotope of carbon that has mass number of 14 |
| Explain how different mass numbers of isotopes contribute to the average atomic weight for a given element. | The average atomic mass for an element is calculated by summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth. |
| In a neutral atom: | amount of protons and electrons is equal |
| In an isotope: | number of protons is the same, but the number of neutrons is different for different isotopes of the same element. |
| In an ion: | number of electrons and protons is no longer equal. |
| Ion | atom that has a net negative or positive charge . |
| How is charge represented? | by plus or minus sign after the number |
| Anion | ion with a negative charge |
| Cation | ion with a positive charge |
| Explain Cl 1- | it is a chlorine atom that has one extra electron, it is negativelly charged, called anion |
| Explain Na 1+ | It is a sodium ion that has one extra proton ( it lost one electron), it has positive charge, it is called cation |
| Which distinguished an atom of one element from atom of a different element? | number of protons |
| Describe an atom: | a core of protons and neutrons surrounded by electrons |
| What is found the farthest from the center of the atom? | electron |
| Compare subatomic partciles | electron-negative-smallest mass,around nucleus neutron-neutral- mass as proton-in the nucleus proton-positive-in nucleus-mass as neutron |
| If neutral atom of silver (Ag) has 47 protons, how many electron will orbit its core: | 47 |
| Subatomic particles found inside the nucleus of an atom | proton and neutron |
| Describe the relationship of subatomic particle in a neutral atom | the number of protons equal the number of protons |
| Who developed atomic theory of matter? | Dalton |
| The Planetary model? | Rutherford |
| The Solid sphere? | Dalton |
| Who discovered the nucleus? | Rutherford |
| The Cathode ray tube experiment? | Thomson |
| All elements are composed of atoms? | Dalton |
| Plum pudding model? | Thomson |
| Gold foil experiment? | Rutherford |
| Discovered electron? | Thomson |
| Model with electrons orbiting energy levels? | Bohr |
Created by:
desilva13