22. Elements that have metallic and non-metallic properties are called a. metalloids b.semi-conductors c. non metals d. alloys Sabne buot olo nomme 23. Which element has an atomic mass of 238.03 amu? a) uranium b) plutonium c) radium апо anousis to his bustl d. neptunium 120 24. Which of the following is not a part of John Dalton's atomic theor a. All natter is made of small, indivisible particles called atoms. b. All the atoms of an element are identical in properties such as size and mas c. Atoms of different elements have the same properties. d. Atoms of different elements can combine in specific ways to form new su 25. An ionic bond forms between a metal and non-metal. A. True

22. Elements that have metallic and non-metallic properties are called a. metalloids b.semi-conductors c. non metals d. alloys Sabne buot olo nomme 23. Which element has an atomic mass of 238.03 amu? a) uranium b) plutonium c) radium апо anousis to his bustl d. neptunium 120 24. Which of the following is not a part of John Dalton's atomic theor a. All natter is made of small, indivisible particles called atoms. b. All the atoms of an element are identical in properties such as size and mas c. Atoms of different elements have the same properties. d. Atoms of different elements can combine in specific ways to form new su 25. An ionic bond forms between a metal and non-metal. A. True

Living by Chemistry

2nd Edition

ISBN:9781464142314

Author:Angelica M. Stacy

Publisher:Angelica M. Stacy

ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding

Section: Chapter Questions

Problem 11STP

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Similar questions

One of the best indications of a useful theory is that it raises more questions for further experimentation than it originally answered. Does this apply to Daltons atomic theory? Give examples.
Do the proton and the neutron have exactly the same mass? How do the masses of the proton and the neutron compare to the mass of the electron? Which particles make the greatest contribution W the mass of an atom? Which particles make the greatest contribution to the chemical properties of an atom?
How do isotopes of a given element differ? How are they similar?
See the definition for isobars in Question 15. Consider Cr-54, Fe-54, Fess, and Ni-S8. (a) Which of these are isobars? Which are isotopes? (b) What do Fe-S4 and Fe-58 have in common? (c) Which atoms have the same number of neutrons?
The existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?
Which of the following are isotopes of element X, the atomic number for which is 9: 919X, 920X, 189X, and 921X?
How would you expect the chemical properties of isotopes of the same element to compare to each other? Explain your answer.
Scientists J. J. Thomson and William Thomson (Lord Kelvin) made numerous contributions to our understanding of the atom’s structure. Which subatomic particle did J. J. Thomson discover, and what did this lead him to postulate about the nature of the atom? William Thomson postulated what became known as the “plum pudding” model of the atom’s structure. What did this model suggest?
An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass 205.9745 u, 22.10% of an isotope with mass 206.9759 u, and 52.40% of an isotope with mass 207.Y766 u. Calculate the average atomic mass, and identify the element.
The Rutherford experiment was performed and its conclusions reached before protons and neutrons were discovered. When they were found, why was it believed that they were in the nucleus of the atom?
For each of the isotopes in Exercise 21.1, determine the numbers of protons, neutrons, and electrons in a neutral atom of the isotope.
An isotope of americium (Am) with 146 neutrons is used in many smoke alarms. (a) How many electrons does an atom of americium have? (b) What is the isotope's mass number A? (c) Write its nuclear symbol.