No molecular forces are at work. An increase in the temperature increases the speed the particlesof gas move.When energy is added to an object, its molecules move faster, creating more heat.
I believe the answer is Nazca plate converging with the South American plate if you’re doing that test
The mentioned isotopes are isotopes of elements Uranium (U) and Lead (Pb). The atomic number of U and Pb are 92 and 82, respectively. When an isotope is reported as U-238 for example, 238 is the mass number, which is the sum of the number of protons and neutrons. Since we know the atomic number, we can find the neutrons from the mass number. For the number of electrons, it is equal to the number of protons because it is neutral.
1. U-238
Number of protons: 92
Number of electrons: 92
Number of neutrons: 238 - 92 = 146
2. U-234
Number of protons: 92
Number of electrons: 92
Number of neutrons: 234 - 92 = 142
3. Pb-214
Number of protons: 82
Number of electrons: 82
Number of neutrons: 214 - 82 = 132
4. Pb-210
Number of protons: 82
Number of electrons: 82
Number of neutrons: 210 - 82 = 128
5. Pb-206
Number of protons: 82
Number of electrons: 82
Number of neutrons: 206 - 82 = 124
The correct answer is C. An atom having only one valence electron is highly chemically reactive. The valence electron says a lot to the reactivity of an atom. For example, sodium has only one valence electron which makes it so reactive and unstable. The alkali metals have only 1 valence electron.
Answer:
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Explanation:
An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native. ... Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.
