What is an element: Simple substances that can not be broken down into simpler substances.
What is an atom: smallest part of an element that can be identified as an element. .
How do you right a chemical symbol: If it is one letter capitalize it, if there are two letters capitalize the first letter but not the second.
Malleable- metals that can be hammered into thin sheets like aluminum foil. .
Ductile- metals that can be drawn into wire.
Luster- shine.
Brittle-breaks easily.
Who stated the atomic theory of matter: Dalton.
What are the main physical properties of metals and non metals: Metals tend to give up electrons when they bond but Non metals tend to gain or share electrons when they bond.
What are valence electrons: The electrons on the last energy level of an atom, which are used in chemical bonds.
Ion- a non-neutral atom.
Isotopes- Atom of an element with the same number of protons but a different number of neutrons.
What is the mass of protons and neutrons and electrons: Protons & Neutrons = 1 AMU / electrons = 1/1836 AMU.
What does the atomic number tell you: Number of Protons in the nucleus of an atom.
What happens to an electron if it looses or gains energy: As it looses energy it will drop to an energy level closer to the nucleus but as it gains energy it will move to an energy level away from the nucleus.
How do you figure out the atomic mass: .
Do isotopes have different atomic masses or atomic numbers: atomic mass.
1st energy level holds 2 electrons 2nd holds 8.
Mass number - atomic number = number of neutrons.
Two people have been credited for determining the need for dark matter. ... Exactly what dark matter is really composed of is purely theoretical at this time. ... Black Holes on the other hand have an over abundance of matter. ... Therefore they would pass through normal matter. ... In order for WIMPs to be a plausible candidate for the explanation of dark matter there must be millions of WIMPs passing through normal matter every few seconds. ...
Dark Matter Astronomers have wondered for ages about the existence of dark matter. ... Dark matter is thought to exist as large black rings surrounding galaxies. The space between planets and stars isn't just nothing, it's probably matter of some sort. ... So dark matter is full of WIMPs! The first evidence of dark matter was found in clusters of galaxies in 1933. ...
There is perhaps no current problem of greater importance to astrophysics and cosmology than that of "dark matter". ... Hence we infer that there is non-luminous matter in the Universe, i.e. there is dark matter. Dark matter has important consequences for the evolution of the Universe. ... Then, under non-baryonic, hot dark matter (HDM) and cold dark matter (CDM) are its types. ... The ever-so important question what is dark matter will not be answered tomorrow. ...
Jhumpa Lahiri A Temporary Matter "A Temporary Matter" is a story that shows the harsh, cold realities of the world. ... This is not a typical Indian story as a matter of fact it's quite the opposite. ... "A Temporary Matter," a title in which the story begins with, "The notice informed them that it was a temporary matter: for five days their electricity would be cut off for one hour, beginning at eight P.M." ... This temporary matter didn't seem like it but it held so much importance in these two people's lives. ... "A Temporary Matter," is a tale of woes, which is ...
It did not matter to her what time we went to bed, she was going to make sure that I was getting it. She and I would study every subject and every grueling play in our playbook every night no matter what her plans were. ... Again, medication was never an option for my mother or myself for that matter. ...
Instead of functioning as a balancing element in the government, Hitler disrupted the conduct of affairs by continually acting on sudden impulses, each one different, and partly by delaying decisions on current matters. ... "He disliked reading files...I got decisions out of him, even on very important matters, without him ever asking me for the relevant papers. ...
This system locates white and gray matters in the brain. ... The findings demonstrated that information processing occurred in gray matter. It was also found that women have more white matter in their brains than grey matter related to IQ scores. Hence, the white matter can be related to intelligence in women and grey matter can be related to intelligence in men. This may to some extent explain men's` superiority in spatial abilities, because women`s intelligence is linked to white matter (responsible for information transmutation) but men`s intelligence is linked to their gray matter (re...
The ancient man had no real protection against the fluke, or for that matter, any parasite able to withstand a long range of climates and environmental conditions. ... Ironically, the "hard matter" in food played largely into the lack of knowledge -- not knowing what is in the food or how to remove it for that matter. Teeth were worn down "through attrition, which were universal-caused by the chewing of hard particulate matter in food" (Oxford Encyclopedia of A...