Chemistry

what are two things that affect gravity?
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Between Na and Na+ which has larger size
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which type of matter cannot be broken done into simplier substances by a chemical change
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Which statements describe a human-created mass extinction? Select three correct choices.
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What makes the atomic radius change along a period in the periodic table?A. More electrons in the valence shell make the radius bigger.B. More protons in the nucleus pull the electrons in, making theatomic radius smaller.C. The increased atomic mass makes the atomic radius bigger.D. More electrons pair in orbitals, making the atomic radius smaller.
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what are parts of this water wheel system?
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Which of the following substances is an element? A. water B. table salt C. iron oxide D. hydrogen
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Please tell me and why ?
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The chemical formula for hydrogenperoxide is H2O2. What is the totalnumber of atoms in one molecule ofhydrogen peroxide?A 2B 4C6D 8
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Subscripts are used in a chemical formula to show the number of atoms of each element. True or False.If endothermic means that the temperature increases and exothermic means it decreases, it 64 degrees to 64 degrees (it stayed the same) endothermic or exothermic?
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PLEASE APEZ HELP I DONT UNDERSTAND A teacher placed a plastic cup of warm coffee with a lid in the freezer.Which statement describes the frozen coffee in comparison with the warmcoffee?A. The amount of coffee is the same.B. The speed of the coffee molecules has increased.C. The temperature of the coffee has increased.D. The arrangement of the coffee molecules is the same.
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what is the orbital notation for silver?
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What mass of benzene takesup325 mL if its density is0.874 g/mL?
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An element is lustrous, brittle, and silver colored. What type of element is it Metal MetalloidNon Metal OtherWill give brainlist
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2. If a person in a wheelchair wanted to get to the second story of a two-story building, would it be easier totake a short, steep ramp or a long, shallow ramp? Explain.
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what are the physical characteristics of sand
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Calculate the number of molecules in 2.00 moles H2S.Express your answer numerically in molecules.
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solve this very easy choose option fast
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How would you determine an atom's charge?
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Is Magnesium less reactive than Aluminum ? Yes or No
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How do clastic sedimentary rocks form?Solid chemicals in water harden and form rocks.Fragments of rock are squeezed and cemented together.Lava cools and hardens into rock.Plant and animal remains are squeezed and cemented together.Plz help I give the brainlyest
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Calculate the average atomic mass of silver if 13 out of 25 atoms are silver -107 and 12 out of 25 atoms are silver -109
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How does energy (heat) flow in the ocean?
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Compare and contrast Transverse Waves and Longitudinal Wave
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