Review Section Key
... The atomic mass of an element is the weighted average mass of the naturally occurring isotopes. a. Explain how mass number and atomic mass are different. __Mass number is the actual number of protons and neutrons in an individual atom, weight average is an average of a sample of atoms___ b. What the ...
... The atomic mass of an element is the weighted average mass of the naturally occurring isotopes. a. Explain how mass number and atomic mass are different. __Mass number is the actual number of protons and neutrons in an individual atom, weight average is an average of a sample of atoms___ b. What the ...
ATOMIC STRUCTURE Text Book Chapters 2, 4, 5 OBJECTIVES
... dense nucleus separated from electrons located outside The difference is that Electrons do not stay in definite fixed orbits – rather they are probably found in a region around the nucleus called an _________________ Picture of current model: ...
... dense nucleus separated from electrons located outside The difference is that Electrons do not stay in definite fixed orbits – rather they are probably found in a region around the nucleus called an _________________ Picture of current model: ...
Atoms, Molecules and Ions
... Atomic number (Z) = number of protons in nucleus Mass number (A) = number of protons + number of neutrons = atomic number (Z) + number of neutrons Isotopes are atoms of the same element (X) with different numbers of neutrons in their nuclei ...
... Atomic number (Z) = number of protons in nucleus Mass number (A) = number of protons + number of neutrons = atomic number (Z) + number of neutrons Isotopes are atoms of the same element (X) with different numbers of neutrons in their nuclei ...
atoms - Cloudfront.net
... 2. Atoms of same element identical in size, mass, properties; atoms of diff elements diff. in size, mass, properties. 3. Atoms can’t be subdivided, created, destroyed. 4. Atoms of different elements combine in wholenumber ratios to form chemical compounds. 5. In chemical reactions, atoms are combine ...
... 2. Atoms of same element identical in size, mass, properties; atoms of diff elements diff. in size, mass, properties. 3. Atoms can’t be subdivided, created, destroyed. 4. Atoms of different elements combine in wholenumber ratios to form chemical compounds. 5. In chemical reactions, atoms are combine ...
2.3 Periodic Table and Atomic Theory Bohr Diagrams
... not want to gain or lose electrons. This is why they do not react easily with other elements! ...
... not want to gain or lose electrons. This is why they do not react easily with other elements! ...
Atoms, Molecules and Ions Part 2
... RADIOACTIVE and can emit particles and energy). • All naturally occurring elements have 2 or more isotopes. • Isotopes exist in different amounts (called isotopic abundance) and have different lifetimes. • A mass spectrometer is the most direct and accurate means of determining atomic weights and th ...
... RADIOACTIVE and can emit particles and energy). • All naturally occurring elements have 2 or more isotopes. • Isotopes exist in different amounts (called isotopic abundance) and have different lifetimes. • A mass spectrometer is the most direct and accurate means of determining atomic weights and th ...
Atomic Structure and Periodic Table Review WS
... impure (mixed with other elements). They had also measured the relative masses of the atoms but could not figure out what made up an atom’s mass since they knew the number of protons and electrons must be equal, but electrons were too tiny to really contribute to the mass. In addition, they noticed ...
... impure (mixed with other elements). They had also measured the relative masses of the atoms but could not figure out what made up an atom’s mass since they knew the number of protons and electrons must be equal, but electrons were too tiny to really contribute to the mass. In addition, they noticed ...
How to Obtain the Number of Sub
... Equal to the # of protons plus the # in the upper right corner if followed by a (-) OR minus the # in the upper right corner if followed by a (+) ...
... Equal to the # of protons plus the # in the upper right corner if followed by a (-) OR minus the # in the upper right corner if followed by a (+) ...
Atoms, Molecules and Ions I. Atomic Theory A. Dalton`s Postulates
... 1. group number of representative element or main group elements are 1,2,13,14,15,16,17,18 2. transition elements are in the center of the periodic table- groups 3 – 12; contain many elements with more then 1 charge b. Groups can also be numbered with a letter 1. A elements are called representative ...
... 1. group number of representative element or main group elements are 1,2,13,14,15,16,17,18 2. transition elements are in the center of the periodic table- groups 3 – 12; contain many elements with more then 1 charge b. Groups can also be numbered with a letter 1. A elements are called representative ...
atom - West Ada
... The living things on Earth are composed mostly of the elements oxygen, carbon, nitrogen and hydrogen. ...
... The living things on Earth are composed mostly of the elements oxygen, carbon, nitrogen and hydrogen. ...
CHEM 115 EXAM #1
... What mass of aluminum contains a number of aluminum atoms equal to the number of basketballs found above? ...
... What mass of aluminum contains a number of aluminum atoms equal to the number of basketballs found above? ...
Chem Notes
... - 4 elements: fire, earth, air and water - their ideas prevailed because they had more influence at the time Scientific Revolution 1450-1850 - increased in evidence-based conclusions - development of Atomic Theory - Lavoisier - LOCM 1700s - Robert Brown - Brownian Motion 1827 - John Dalton early 180 ...
... - 4 elements: fire, earth, air and water - their ideas prevailed because they had more influence at the time Scientific Revolution 1450-1850 - increased in evidence-based conclusions - development of Atomic Theory - Lavoisier - LOCM 1700s - Robert Brown - Brownian Motion 1827 - John Dalton early 180 ...
01 - cloudfront.net
... 16. Analyzing Processes Particle accelerators are devices that speed up charged particles in order to smash them together. Scientists use these devices to make atoms. How can scientists determine whether the atoms formed are a new element or a new isotope of a known element? ________________________ ...
... 16. Analyzing Processes Particle accelerators are devices that speed up charged particles in order to smash them together. Scientists use these devices to make atoms. How can scientists determine whether the atoms formed are a new element or a new isotope of a known element? ________________________ ...
Investigating Atoms and Atomic Theory
... in the periodic table. Also known as Families. Families may be one column, or several columns put together. The elements in each group or family, have similar characteristics. Families have names rather than numbers. (Just like your family has a common last name.) ...
... in the periodic table. Also known as Families. Families may be one column, or several columns put together. The elements in each group or family, have similar characteristics. Families have names rather than numbers. (Just like your family has a common last name.) ...
Document
... -swarm around nucleus (electron cloud) -can be attracted away or added w/o chemical change -very light 1/1837 mass of proton (negligible) neutral atom-same number of p+ as e- (zero net charge) remember ion: atom with net charge ...
... -swarm around nucleus (electron cloud) -can be attracted away or added w/o chemical change -very light 1/1837 mass of proton (negligible) neutral atom-same number of p+ as e- (zero net charge) remember ion: atom with net charge ...
P-Atomic_Structure_Ppt - McKinney ISD Staff Sites
... they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hit ...
... they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hit ...
Atomic Structure
... Quantum Mechanical Model of the Atom • This model suggests that electrons are located at definite energy levels inside an electron cloud • According to this theory, the electrons do not travel in paths around the nucleus, but can be found anywhere within a defined region of space around the nucleus. ...
... Quantum Mechanical Model of the Atom • This model suggests that electrons are located at definite energy levels inside an electron cloud • According to this theory, the electrons do not travel in paths around the nucleus, but can be found anywhere within a defined region of space around the nucleus. ...
UNIT 1 Review
... is one where the different parts can be easily seen. o A Homogeneous mixture is one where the particles are mixed so well that the separate parts cannot be seen. ...
... is one where the different parts can be easily seen. o A Homogeneous mixture is one where the particles are mixed so well that the separate parts cannot be seen. ...
Unit 3 Review
... It tells us that electrons exist in 3-D space around the nucleus, it can tell us the probability of where an electron is about 90% of the time ...
... It tells us that electrons exist in 3-D space around the nucleus, it can tell us the probability of where an electron is about 90% of the time ...