Your friend says that what makes one element distinct from another is the number of electrons about the atomic nucleus. Do you agree wholeheartedly, partially, or not at all? Explained • NO • What makes one element distinct from another is the number of protons in the nucleus. Hydrogen has 1, gold has 79, uranium has 92, etc. Not electrons.
Neutrons, Protons and electrons are all sub-atomic particles. In relative mass, we always think of protons and neutrons in having a mass of 1 and electrons a mass of 1/1840, which shows that electrons are considerably smaller than protons and neutrons, and only make up a small part of the atom. The amount of protons and neutrons added together is the relative atomic mass, and this is the main structure of the atom. 2. The arrangement of particles in an atom Protons and neutrons make up the main, dense, central nucleus in the centre of the atom.
Inverse Square Law Newton's law of gravity describes a force that decreases with the SQUARE of the distance. For every factor of 2 the distance increases, the gravitational attraction decreases by a factor of 2 × 2 = 4; for every factor of 3 increase in distance, the gravity decreases by a factor of 3 × 3 = 9 (not by 3 + 3 = 6! ); for every factor of 4 increase in distance, the gravity decreases by a factor of 4 × 4 = 16 (not by 4 + 4 = 8! ), etc. See the mathematics review appendix for a review of ``factor'' and ``times''.
Then use the multiplication principle and then use the elimination method: 3x=8y+11 x+6y-8=0 9. A vending machine contains nickels and dimes worth $14.50. There are 95 more nickels than dimes. How many nickels and how many dimes are there? 10.
This will bring your equation to look like this: 3H2O+Fe ---> FeO3+H2 The equation is not yet balanced, since we now have an uneven number of iron and hydrogen atoms. To fix this, we will put a two in front of the Fe on the left, to give you the proper number of iron atoms. Then, we will put a three in front of the hydrogen on the right, to give the proper number of all
The percent error is much higher for the first order stopping potential than for the second. This may be due to the fact that the lamp was not fully heated when the measurements were taken. There was not a gauge anywhere to tell when the lamp was fully heated, so it was more of a guessing game than anything. Another source of error may have been the ambient light in the lab. This may have entered the detector during the experiment, skewing the data.
Rodan-222, a radioactive isotope sometimes fund in people’s basements has half-life of then 4 days. The shorter the half-life, the active appearing the atom is. For example, a test tube containing a gram of Rn-222 will cause a Geiger counter to click a raster rate then a gram of U- 238 because more atoms are changing per second. In our lab we will calculate the half-life of Ba-137m. This metastable radioactive isotope has a half-life of less than 5 minutes and is made from the radioactive decay of Cs-137 in a mini-isotope generator.
The smallest relative difference that is not statistically significant is stress management at -0.63. The reason that this ratio is not statistically significant is because the value used to determine significance was lower than 0.05. The smaller t ratio has an increased p value and the odds of being able to reject the null hypothesis are diminished. This result means
8) See column 8 and back for work. 9) My accuracy was not really bad but it wasn’t that good, some of the guesses I made were almost accurate but others were way off. Atom | Average mass of one atom | Mass relative to carbon (#:1) | Atomic mass (from periodic table) (g) | Number of atoms in a relative mass (column 4/ column 2) | Carbon | 2.00E-23 | 1 | 12.01 (g) | 6.005 x 1023 | Iron | 9.30E-23 | 4.65:1 | 55.85 (g) | -65.15 | Aluminum | 4.49E-23 | 2.245 | 26.98 (g) | 6.010 x 1023 | Zinc | 1.08E-22 | 5.4 | 55.85 (g) | 5.17 x 1023 | Lead | 3.44E-22 | 17.2 | 207.2 (g) | 6.024 x 1023 | Copper | 1.05E-22 | 5.25 | 63.55 (g) | 6.052 x 1023 | PART:2 Question 1) I think carbon’s role is something to do with global warming I think I’m not sure, this doesn’t make sense because why does global warming have anything to do with the mole or even chemistry. | 2) In column 5 all the numbers are very close to Avogadro’s number 6.02 x 1023. 3) One gram = 6.02 x 1023 amu.
Sweden , for instance, has spent $14 Billion and rising to manage its radioactive waste and is now decommissioning its reactors. Nuclear power is not green due to all the points made above and also due to the following additional facts; namely that nuclear power plants use a great deal of water, uranium is a non-renewable resource and there is significant energy and resources needed to build nuclear plants. CONS - Nuclear power is not a renewable source of energy. High-grade, low-cost ores will run out in 50 years - It is not "greenhouse gas" free, producing more emissions than some renewable power sources such as wind - It would take at least 10 years and several billion dollars to build Australia's first nuclear power station - Plants are potential targets for terrorists attacks; smuggling of radioactive material is on the rise; no complete solution to the disposal of radioactive waste has been