Chemistry

Howmyny moles are present in 5.6x1022 atoms of Ne? (0.09 moles Ne)Sot ne10.05
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The melting and boiling points of a group of elements decrease as you go down the group, while their reactivity increases.a.. Are the elements from the first group or the second last group of the Periodic Table?b ..Does this group consist of metals, metalloids, non-metals or a mix?c.. Identify two elements in this group.
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Compound: ________________ . Found in soil; contains hydrogen (H) and oxygen (O)
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i need help and its for science cause i have a bad grade in it and have 3 days to get all my grades up so help pls?
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Which type of matter is always made up of only one kind of atom?A. ElementB. MixtureC. MoleculeD. Compound pls answer fast
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Each of the atoms in alkali earths metal Family( group 2) has ___ valence Electrons .Pleasee help Ill mark you as brainlister Fill in the blank
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Examine the layers of rock. Identify and explain which layer contains the youngest fossils.Earth layers with fossiles in each labeled top to bottom A to D.
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__Hgo > __Hg + __O2?
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19. Chemical properties can be used to(1) differentiate between two compounds(2) determine the temperature of a substance(3) determine the density of a substance(4) differentiate between two neutrons
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What harmful rays does the atmosphere block?
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Reducing child __________, or rate of death, is one of the primary goals of the UNs Millennium Development Goals.A.mortalityB.maternityC.infirmityD.infection
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please help asappp will mark branliest!!
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235/92 U + 1/0 n -> 138/55 Cs + 96/37 Rb + 2 1/0 n what kind of reaction?
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Complete a write up about the elements in Ammonia and explain how the elements bounded to create the new substance.
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which gas is the most dense under standard temperature and pressure?A. H2B. NeC. ArD. O2
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what are the spectrum lines, and they're color emmited and nanometers
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Is hydrogen a metal or a nonmetal? How many valence electrons does a hydrogen atom have?
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what is the formula for zinc sulfide
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how did domestication of early crops start?
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Convert the following to Celsius6) 32F7) 45F8) 70F9) 80 F10) 90 F11) 212F
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Do you believe that in 2020 every single American, regardless of race, sex, or income level, has an equal opportunity to achieve his/her American Dream? Why or why not?
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How many grams of F are in 225 g CaF2?
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What measuring tool is used to find the volume of a shoe box?A.water displacementB.scaleC.beakerD.ruler
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How do I find the hydrated formula?
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