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Which of these statements is true? The number of electrons outside the nucleus is the same...
QUESTION 15 Which one of the following statements about atomic structure is false? An atom is mostly empty space. Almost all of the mass of the atom is concentrated in the nucleus. The protons and neutrons in the nucleus are very tightly packed. The number of protons and neutrons is always the same in the neutral atom. All of these statements are true.
7. True or False: When an atom forms an ion, only the number of valence electrons changes; the number of protons and neutrons remains the same as in the non-ionic (1 pt.) form.
Isotopes have _____ a. the same number of protons but different numbers of electrons. b. the same number of neutrons but a different number of protons. c. the same total number of protons and neutrons. d. the same number of protons but a different number of neutrons. e. the same atomic mass. Identify the element based on the following values for its three isotopes: 38.9637 amu (93.08%), 39.9640 amu (0.012%), and 40.9618 amu (6.91%). a. Cl b. Ar c. S...
17. Identify the elements that have the following electron arrangements: b. 2,8,6 а. 2,4 c. 2,8,8 d. 2,1 f. 2,8, е. 2,8 g. 2,8,8,2 18. Write the group number and draw the electron-dot symbol for each of the following elements: a. sulfur b. nitrogen c. calcium d. sodium 19. The atomic number of an atom is equal to the number of A) neutrons plus protons B) nuclei C) electrons plus protons E) neutrons D) protons 20. The number of neutrons...
65) The nucleus of an atom contains: a) protons and electrons b) just electrons c) electrons and neutrons d) protons and neutrons e) neutrons 66) The atomic number of an atom is: a) the number of electrons it has b) the number of neutrons it has c) the number of protons it has d) the number of protons plus the number of neutrons it has e) the combined total of protons, neutrons and electrons that it has 67) In water,...
Which statements are inconsistent with Rutherford's nuclear theory that was originally stated? a) Helium atoms have two protons in the nucleus and two electrons outside the nucleus. b) Most of the volume of hydrogen atoms is due to the nucleus. c) Aluminum atoms have 13 protons in the nucleus and 22 electrons outside the nucleus. d) The majority of the mass of nitrogen atoms is due to their 7 electrons. Protons, Neutrons, and Electrons 9) Which statement about protons is...
11) Which of the following statements is correct? A) The atomic number = the number of protons, the mass number = the number of protons + the number of electrons B) The atomic number = the number of protons, the mass number = the number of protons + the number of neutrons C) The atomic number = the number of protons, thą mass number = the number of neutrons D) The atomic number = the number of neutrons, the mass...
Who found that the atomic number was equal to the number of protons in the nucleus and to the number of electrons outside the nucleus in a neutral atom? Meyer Newlands O Moseley ooo Mendeleev Thomson
Atomic number c. Valance electrons d. Orbits e. Neutrons Indicate whether each of the following statements about atomic structure is true or false. a. A neutral oxygen atom has 8 electrons located in 2 different electron orbitals. T/F b. Hydrogen has only one neutron and no protons in its nucleus. T/F c. Almost all of the mass of an atom is concentrated in its electrons. T/F d. The reactivity or chemical behavior of an atom depends primarily on the number...
26 Which statement is NOT TRUE? (A) Every atom of a given element has the same number of protons. (B) Almost all of the mass of an atom is located in the nucleus. (C) A given chemical species doesn't always have the same type and number of atoms. (D) The large cloud region of the atom contains electrons, which are 50% of the mass of the aton (E) Different isotopes of the same element have different numbers of neutrons.