Which of the following is a part of Dalton\'s atomic theory? Atoms are rearrange

Question

Which of the following is a part of Dalton's atomic theory? Atoms are rearranged but not changed during a chemical reaction. Atoms break down during radioactive decay. Atoms contain protons, neutrons, and electrons. Isotopes of the same element have different masses. The specific heat of copper is 0.385 j/(g -degree C). If 34.2 g of copper, initially at 25 degree C, absorbs 4.689 kJ, what will be the final temperature of the copper? 25.4 degree C 27.8 degree C 356 degree C 381 degree C A proton is approximately 200 times larger than an electron. 2000 times larger than an electron. 200 times smaller than an electron. 2000 limes smaller than an electron Which are isotopes? An atom that has an atomic number of 34 and a mass number of 76 is an isotope of an atom that has an atomic number of 32 and a mass number of 76. an atomic number of 34 and a mass number of 76. 46 neutrons and 34 protons. 42 protons and 34 neutrons. How many protons (p), neutrons (n), and electrons (e) are in one atom of^23 _12 Mg? 12 p, 12 n, 12 e 12 p, 11 n, 12 e 12 p, 11 n, 10 e 12 p, 11 n, 14 e

Explanation / Answer

Answer:

26). B. 2000 times larger than an electron

Almost all of the mass of an atom is in nucleus, because the mass of a proton or neutron is about 2000 times larger than the mass of an electron.

27). B. an atomic number of 34 and a mass number of 76

The atomic number is 34 that cannot change in isotopes. The number of protons determine the element. An isotope has the same atomic number but a different number of neutrons. The protons and neutrons make up the atomic mass.

28). B. 12 p, 11 n, 12 e

Atomic number is equal to protons or neutrons. Atomic mass-atomic number = number of neutrons

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