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1. Chemistry

   Why does the emission of an alpha particle always result in transmutation? - Energy is released from the nucleus of the atom. -The number of neutrons in the atoms changes. -The number of protons in the atom changes. -The atom is

2. chem

   1. under what circumstances is the molecular geometry around a single central atom the same as the electron group geometry around the central atom? 2.If all of the electron groups around a single central atom are bonding, and the

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   1.which of the following is the most polar bond? explain n-f c-f h-f o-f 2. in the trigonal bipyramidal geometry, which position - axial or equatorial - do nonbonding electrons prefer? why? 3.under what circumstances is the

4. physics

   The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.0 10-15 m. The single electron in a hydrogen atom normally orbits the nucleus at a distance of 5.3 10-11 m. What is the ratio of the density of the

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   Earth Science Origins of the Universe Quick Check ------------------------------------------------------------------------------------- Which describes nuclear fusion? (1 point) A - starts when two atoms slam together, causing the

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   Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon

3. chemistry help

   Determine the number of moles of each specified atom or ion in the given samples of the following compunds.( Hint: the formula tells you how many atoms or ions are in each molecule of formula unit.) a. O atom in 3.161x10^21

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   When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom B. The oxygen atom donates an electron to each hydrigen atom C. A pair

1. Science

   Please check my answer. --------------------------------------^^ Why does the emission light of an alpha particle always result in transmutation? A. Energy is released from the nucleus of the atom. B. The number of protons in the

2. chrmistry

   In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?

3. Algebra

   The diameters of four different types of atoms are given below. Atom A: 1.35 * 10^-7 mm; Atom B: 1.80 * 10^-7 mm; Atom C: 6.00 * 10^-8 mm; Atom D: 2.50 * 10^-8 mm What is the order of these atoms from largest to smallest? (1

4. chemistry

   draw a diagram showing the arrangement of the valency electrons in one molecule of the covalent compound selenium chloride. use x to represent an electron from an atom of selenium. use o to represent an electron from an atom of

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