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Sub-Atomic Particles
Electron Cloud and Bohr
Numbers
Matter
The Periodic Table
100
Atoms of the same element whose nucleus contains different numbers of neutrons are called this. a. What are isotopes? b. What are ions? c. What are elements?
a. What are isotopes?
100
The most modern model of an electron, that indicates where an electron is likely to be. Paths of electrons are not orbits, but instead are three dimensional shapes. a. What is the bohr model? b. What is the electron cloud model?
b. What is the electron cloud model?
100
The Mg atom becomes the ion, Mg2+, when this happens. a. What is it gains 2 electrons? b. What is it loses 2 electrons?
b. What is it loses 2 electrons?
100
This has mass and takes up space. a. What is matter? b. What are atoms? c. What is volume?
a. What is matter?
100
The number of protons in an atom is the __________. a. What is atomic number? b. What is atomic mass? c. What is charge?
a. What is atomic number?
200
The mass of an atom is determined mainly by the mass of these particles. a. What are neutrons and protons? b. What are protons and electrons? c. What are electrons and neutrons?
a. What are neutrons and protons?
200
What number is found when# of protons is added to # of neutrons. a. What is atomic mass? b. What is atomic number?
a. What atomic mass?
200
Found by finding the differences between protons and electrons. a. What is the number of neutrons? b. What is the atomic number? c. What is the charge?
c. What is the charge?
200
The study of the composition, structure, and properties of matter and the changes that matter undergoes. a. What is biology? b. What is physics? c. What is chemistry?
c. What is chemistry?
200
The largest number of valence electrons an atom in the first period can have is ____. a. What is 2? b. What is 10? c. What is 8?
a. What is 2?
300
The mass number for an isotope of oxygen is 17 and the atomic number is 8. This number of neutrons are present in this isotope of oxygen. a. What is 25? b. What is 9? c. What is 8?
b. What is 9?
300
The element represented by diagram A is ______. a. What is Silicon? b. What is oxygen?
a. What is silicon?
300
Average atomic mass of the isotopes of silicon. If their abundance is as follows, Silicon-28 92.21%,Silicon-29 4.70%, and Silicon-30 3.09% a. What is 28.11 amu? b. What is 29.24 amu? c. What is 28.78 amu?
a. What is 28.11 amu?
300
The fundamental building block of matter. a. What is an atom? b. What is a proton? c. What is the Higgs Boson?
a. What is an atom?
400
Two electrons, A and B, are temporarily raised to different energy levels. As they fall back toward the nucleus, A emits green light and B emits red light. This electron has more energy before falling toward the nucleus. a. What is electron A? b. What is electron B?
a. What is electron A?
400
A diagram is drawn to represent an atom containing 4 electrons in the third energy level. The small, dark circles represent these particles distributed around the nucleus of the atom. a. What are protons? b. What are neutrons? c. What are electrons?
c. What are electrons?
400
How many valence electrons does Neon have? A. 2 b. 10 c. 8
c. 8
500
The lightest of all subatomic particles. a. What is the neutron? b. What is the electron? c. What is the proton?
b. What is the electron?
500
Draw a diagram to represent the electron energy levels of a fluorine atom, atomic number 9.
TEACHER WILL CHECK ANSWERS
500
What is charge of Ca with 18 electrons? a. What is -2? b. What is +2? c. What is 0?
b. What is +2?
500
Each element is represented on the periodic table by a box containing numbers and a letter or letters. Explain what is meant by each number and the letters for the element sodium, which is represented in diagram B.
What is the number 22.990 is the atomic weight of an average sodium ion. The number 23 is the mass number (the number of protons + neutrons of the stable isotope of sodium). The letters Na represent the chemical symbol for sodium. The number 11 is the atomic number (the number of protons in a sodium atom).