30-2 Ch 3 Test Review Atomic Theory DEBRIEF KEY
... 8. Electron transitions between which 2 levels will produce the spectral line associated with the least energy? a. 2 and 1 ...
... 8. Electron transitions between which 2 levels will produce the spectral line associated with the least energy? a. 2 and 1 ...
Chapter 10
... 6. Electron cloud – a region around the nucleus of an atom where electrons are likely to be found 7. Isotope – an atom that has the same number of protons but has a different number of neutrons 8. Atomic number – the number of protons in the nucleus of an atom 9. Atomic mass – the sum of the numbers ...
... 6. Electron cloud – a region around the nucleus of an atom where electrons are likely to be found 7. Isotope – an atom that has the same number of protons but has a different number of neutrons 8. Atomic number – the number of protons in the nucleus of an atom 9. Atomic mass – the sum of the numbers ...
Physical Science 100 Chapter 18, The Periodic Table
... Metals and non-metals are separated by a red “staircase” Elements near this staircase are called semi-metals (or semi-conductors) The noble or inert gases are on the far right. ...
... Metals and non-metals are separated by a red “staircase” Elements near this staircase are called semi-metals (or semi-conductors) The noble or inert gases are on the far right. ...
Electrons
... If it loses 2 electrons it becomes an ion with a charge of 2+. Number of protons 12 Number of electrons - 10 Charge of Ion 2+ ...
... If it loses 2 electrons it becomes an ion with a charge of 2+. Number of protons 12 Number of electrons - 10 Charge of Ion 2+ ...
2A Final Exam Review Worksheet
... o Temperature is proportional to kinetic energy. Two molecules at the same temperature will have the same average kinetic energy. o If two molecules are under the same conditions, the heavier molecule will travel slower ...
... o Temperature is proportional to kinetic energy. Two molecules at the same temperature will have the same average kinetic energy. o If two molecules are under the same conditions, the heavier molecule will travel slower ...
Periodic Table Funsheet (KEY) 1. What family has the most active
... 14. Group 17 elements are called HALOGENS. 15. Group 18 elements are called NOBLE GASES. 16. As you go from left to right across the periodic table, the elements go from (METALS / nonmetals) to (metals / NONMETALS). 17. The most active element in Group 17 is FLUORINE. 18. What sublevels are filling ...
... 14. Group 17 elements are called HALOGENS. 15. Group 18 elements are called NOBLE GASES. 16. As you go from left to right across the periodic table, the elements go from (METALS / nonmetals) to (metals / NONMETALS). 17. The most active element in Group 17 is FLUORINE. 18. What sublevels are filling ...
atom book - District 196
... 1. There are ___________ naturally occurring elements plus another _______ that have been created in a laboratory. ...
... 1. There are ___________ naturally occurring elements plus another _______ that have been created in a laboratory. ...
Standard EPS Shell Presentation
... The mass of individual atoms is so small that the numbers are difficult to work with. To make calculations easier, scientists use the atomic mass unit (amu). The atomic mass of any element is the average mass (in amu) of an atom of each element. ...
... The mass of individual atoms is so small that the numbers are difficult to work with. To make calculations easier, scientists use the atomic mass unit (amu). The atomic mass of any element is the average mass (in amu) of an atom of each element. ...
Give the name and symbol for the element found in
... in rows and columns so that elements with similar properties would be located together. He left blank spaces in his periodic table where no known elements seemed to fit. He explained that these blank spaces represented elements that had not yet been discovered, and based on their position in the per ...
... in rows and columns so that elements with similar properties would be located together. He left blank spaces in his periodic table where no known elements seemed to fit. He explained that these blank spaces represented elements that had not yet been discovered, and based on their position in the per ...
notes - van Maarseveen
... Information in the periodic table – if you look at the square for each element, you will find two important numbers Number at the top = atomic number Number at the bottom = atomic mass Why are the atomic masses not always whole numbers? Some elements have different forms (known as isotopes) that hav ...
... Information in the periodic table – if you look at the square for each element, you will find two important numbers Number at the top = atomic number Number at the bottom = atomic mass Why are the atomic masses not always whole numbers? Some elements have different forms (known as isotopes) that hav ...
Periodic Trends - Barrington 220
... TREND DOWN a family: INCREASES EXPLANATION: as electrons are added to more energy levels, the inner layers shield the outer electrons from the pull of the nucleus. The added electrons have less attraction to the nucleus due to this shielding effect, increasing the atom‛s size ...
... TREND DOWN a family: INCREASES EXPLANATION: as electrons are added to more energy levels, the inner layers shield the outer electrons from the pull of the nucleus. The added electrons have less attraction to the nucleus due to this shielding effect, increasing the atom‛s size ...
Inside the Atom 1. Atom – greek for cannot be divided. Democritus
... ii. All matter in the world looks different because of the types of atoms they contain iii. Matter exists in 4 states gas, liquid, solid or plasma iv. Matter has 2 properties physical & chemical 1. The properties of one type of matter differ from the properties of other matter because matter is ...
... ii. All matter in the world looks different because of the types of atoms they contain iii. Matter exists in 4 states gas, liquid, solid or plasma iv. Matter has 2 properties physical & chemical 1. The properties of one type of matter differ from the properties of other matter because matter is ...
Elements and Atoms
... The Periodic Table of the Elements gives information about each element. We can use the information in the Periodic Table to figure out the number of protons, neutrons and electrons that are in each element. Here is how: a. Find the atomic number. This is the number that identifies each element. It ...
... The Periodic Table of the Elements gives information about each element. We can use the information in the Periodic Table to figure out the number of protons, neutrons and electrons that are in each element. Here is how: a. Find the atomic number. This is the number that identifies each element. It ...
CHAPTER 5, THE PERIODIC LAW Section 1, History of the Periodic
... By 1860, more than 60 elements had been discovered. FYI, there was no method for accurately determining an element’s atomic mass or the number of atoms of an element in a particular chemical compound. In 1869, Dimitri Mendeleev published his periodic table of elements in which elements with similar ...
... By 1860, more than 60 elements had been discovered. FYI, there was no method for accurately determining an element’s atomic mass or the number of atoms of an element in a particular chemical compound. In 1869, Dimitri Mendeleev published his periodic table of elements in which elements with similar ...
Unit Bohr Model and Electromagnetic Radiation - Jones
... nd state of electrons in the atom: 1. Gaining energy results in the electron moving from its ground state to a higher energy level. 2. When the electron moves to a lower energy level, it releases the energy difference in the two levels as electromagnetic radiation (emissions spectrum). Chm.1.3 Under ...
... nd state of electrons in the atom: 1. Gaining energy results in the electron moving from its ground state to a higher energy level. 2. When the electron moves to a lower energy level, it releases the energy difference in the two levels as electromagnetic radiation (emissions spectrum). Chm.1.3 Under ...
A`r ji r/ Ii
... I’ q 7. Complete the chart to name the four phases of matter and compare their volumes, shapes, and average ...
... I’ q 7. Complete the chart to name the four phases of matter and compare their volumes, shapes, and average ...
The Size of the Atom Atomic Numbers Atomic Mass Numbers
... diagram on page 201, picturing the basic structure of the atom, is not drawn to scale. If the nucleus were as large as shown, the electron cloud would extend far beyond your classroom. The negative electrons stick around the nucleus because they are attracted to the positively charged protons. Elect ...
... diagram on page 201, picturing the basic structure of the atom, is not drawn to scale. If the nucleus were as large as shown, the electron cloud would extend far beyond your classroom. The negative electrons stick around the nucleus because they are attracted to the positively charged protons. Elect ...
Atom
... • Atoms of an element don’t always have the same # of neutrons. • These atoms are called isotopes. ...
... • Atoms of an element don’t always have the same # of neutrons. • These atoms are called isotopes. ...
SUMMARY: Introduction and History of Atomism
... the first to succeed in exploring the _______________ ______________ of atoms Performed famous “________ ________ Experiment” The experimental evidence that led to the Rutherford model was the results of bombarding a thin metal foil with an ________ particle (helium nuclei) beam. The beam was ...
... the first to succeed in exploring the _______________ ______________ of atoms Performed famous “________ ________ Experiment” The experimental evidence that led to the Rutherford model was the results of bombarding a thin metal foil with an ________ particle (helium nuclei) beam. The beam was ...
Atomic Structure Worksheet
... 3. The symbol for an element is either a capital letter or possibly a capital letter followed by a lower case letter. 4. Atoms of the same element that differ in their number of neutrons in the nucleus are called isotopes. 5. The total number of nucleons (particles in the nucleus) in the atom make u ...
... 3. The symbol for an element is either a capital letter or possibly a capital letter followed by a lower case letter. 4. Atoms of the same element that differ in their number of neutrons in the nucleus are called isotopes. 5. The total number of nucleons (particles in the nucleus) in the atom make u ...
Atomic Theory and Structure Quiz
... 11. The smallest unit of an element that can exist either alone or in combination with other such particles of the same or different elements is the a. proton. b. neutron. c. atom. 12. Isotopes are atoms of the same element that have different a. numbers of protons. b. masses. c. numbers of electron ...
... 11. The smallest unit of an element that can exist either alone or in combination with other such particles of the same or different elements is the a. proton. b. neutron. c. atom. 12. Isotopes are atoms of the same element that have different a. numbers of protons. b. masses. c. numbers of electron ...
Atom, Ion, Isotope Notes from 10/5 and 10/6
... a good estimation for finding the most common stable isotope of an atom. HOWEVER, it is not a perfect method. Look at Ag for example. It’s atomic mass is 107.87 amu, which would round to 108 amu. This is actually NOT a stable isotope of Ag (only 107 amu and 109 amu are). If you really wanted to know ...
... a good estimation for finding the most common stable isotope of an atom. HOWEVER, it is not a perfect method. Look at Ag for example. It’s atomic mass is 107.87 amu, which would round to 108 amu. This is actually NOT a stable isotope of Ag (only 107 amu and 109 amu are). If you really wanted to know ...
Building an Atom
... For this extra credit project you must build a 3D model of the atom Sulfur- 33. You can use whatever type of supplies you can think of, as long as it looks semi-professional. (Sloppy or incorrect models will receive little to no credit, don’t waste your time). Your model of the atom MUST include all ...
... For this extra credit project you must build a 3D model of the atom Sulfur- 33. You can use whatever type of supplies you can think of, as long as it looks semi-professional. (Sloppy or incorrect models will receive little to no credit, don’t waste your time). Your model of the atom MUST include all ...
Name Test Review Chemistry Unit 2: The Atom 1. Fill in the blank
... Created the first atomic theory based on experimental evidence. ___________________________ Discovered the electron. __________________________ Discovered the nucleus. ___________________________ Discovered the Law of Conservation of Mass. __________________________ Proposed a model of the atom as a ...
... Created the first atomic theory based on experimental evidence. ___________________________ Discovered the electron. __________________________ Discovered the nucleus. ___________________________ Discovered the Law of Conservation of Mass. __________________________ Proposed a model of the atom as a ...