atoms - sciencegeek
... maximum of two electrons. The electrons must have opposite spins. Hund’s Rule: When electrons occupy orbitals of equal energy, one electron ...
... maximum of two electrons. The electrons must have opposite spins. Hund’s Rule: When electrons occupy orbitals of equal energy, one electron ...
C11 Periodic Table Trends Powerpoint
... remove one mole of electrons from one mole of isolated gaseous atoms or ions. You may think of ionization energy as a measure of the difficulty of removing electron or the strength by which an electron is bound. The higher the ionization energy, the more difficult it is to remove an electron. Theref ...
... remove one mole of electrons from one mole of isolated gaseous atoms or ions. You may think of ionization energy as a measure of the difficulty of removing electron or the strength by which an electron is bound. The higher the ionization energy, the more difficult it is to remove an electron. Theref ...
Chapter 5 The Periodic Table
... configuration for an element in that group. • Def.-an electron that is in the highest occupied energy level of an atom ...
... configuration for an element in that group. • Def.-an electron that is in the highest occupied energy level of an atom ...
Notes for Standard 1 Objective 3 (Periodic Table)
... the number of protons plus neutrons. In a neutral atom, the number of protons equals the number of electrons. Flourine’s atomic number is 9 and its atomic mass is 19. Therefore flourine has 9 protons, 9 electrons, and 10 neutrons ( 9 protons + 10 neutrons = 19 atomic mass units). Atoms with the same ...
... the number of protons plus neutrons. In a neutral atom, the number of protons equals the number of electrons. Flourine’s atomic number is 9 and its atomic mass is 19. Therefore flourine has 9 protons, 9 electrons, and 10 neutrons ( 9 protons + 10 neutrons = 19 atomic mass units). Atoms with the same ...
The Periodic Table
... 1. The elements in periods 2 through 7 that are to the left of the zigzagged line are metals. List five metals. 2. The elements in periods 1 through 6 that are to the right of the zigzagged line are nonmetals. List five nonmetals. 3. The elements that border either side of the zigzagged line are met ...
... 1. The elements in periods 2 through 7 that are to the left of the zigzagged line are metals. List five metals. 2. The elements in periods 1 through 6 that are to the right of the zigzagged line are nonmetals. List five nonmetals. 3. The elements that border either side of the zigzagged line are met ...
Ch. 13 Notes---Electrons in Atoms
... tend to __________ e-’s anyway, and this makes them highly ________________ attracted to e-’s when forming a chemical bond. Noble __________ gases – ___________ are not listed in Figure 12.4 since they do not ________ form _____________ compounds ! ...
... tend to __________ e-’s anyway, and this makes them highly ________________ attracted to e-’s when forming a chemical bond. Noble __________ gases – ___________ are not listed in Figure 12.4 since they do not ________ form _____________ compounds ! ...
Chapter 4
... ❶ The oxidation number of the atoms of an uncombined element is 0. ❷ The sum of the oxidation numbers of all atoms in a substance must equal the total charge on the species: 0 for molecules; the ionic charge for ions. ❸ Fluorine has an oxidation number of –1 in its compounds. ❹ Hydrogen has an oxida ...
... ❶ The oxidation number of the atoms of an uncombined element is 0. ❷ The sum of the oxidation numbers of all atoms in a substance must equal the total charge on the species: 0 for molecules; the ionic charge for ions. ❸ Fluorine has an oxidation number of –1 in its compounds. ❹ Hydrogen has an oxida ...
Atomic Structure and the Periodic Table of Elements: The Secret
... The Periodic Table of Elements is arranged in horizontal rows, called periods and vertical columns, called groups. The trends or patterns of the Periodic Table of Elements demonstrated in this activity include: o The group number—usually depicted by a Roman numeral above the group— refers to the num ...
... The Periodic Table of Elements is arranged in horizontal rows, called periods and vertical columns, called groups. The trends or patterns of the Periodic Table of Elements demonstrated in this activity include: o The group number—usually depicted by a Roman numeral above the group— refers to the num ...
Atomic Radius - Atomic radius is simply the radius of
... • The electron on the outermost energy level has to look through all the other energy levels to see the nucleus. • The inner electrons shield the outer electrons from the pull of the nucleus. This effect is known as electron shielding • Second electron has same shielding, if it is in the same period ...
... • The electron on the outermost energy level has to look through all the other energy levels to see the nucleus. • The inner electrons shield the outer electrons from the pull of the nucleus. This effect is known as electron shielding • Second electron has same shielding, if it is in the same period ...
Lecture 10
... Most electrons do not ‘feel’ the full positive charge of the nucleus. Other electrons in the atom (particularly those in lower energy orbitals) ‘shield’ some of this charge. The amount of positive charge ‘felt’ by an electron in a given orbital is called the effective nuclear charge (Z*). The follow ...
... Most electrons do not ‘feel’ the full positive charge of the nucleus. Other electrons in the atom (particularly those in lower energy orbitals) ‘shield’ some of this charge. The amount of positive charge ‘felt’ by an electron in a given orbital is called the effective nuclear charge (Z*). The follow ...
5.3 Representative Groups PPT
... A Groups n numbered 1- 8 n # matches # of valence electrons in electron configuration for element in that group ...
... A Groups n numbered 1- 8 n # matches # of valence electrons in electron configuration for element in that group ...
Chapter 3: Atoms & the Periodic Table
... • Not as reactive as Group 1 but they are more reactive than most metals • Never found uncombined in nature ...
... • Not as reactive as Group 1 but they are more reactive than most metals • Never found uncombined in nature ...
Ch. 6 PPT
... The Modern Periodic Table (cont.) • Vertical columns of elements are called ___________ • Rows of elements are called _________ • Elements in groups 1,2, and 13-18 possess a wide variety of chemical and physical properties and are called the representative elements (or the main group elements). ...
... The Modern Periodic Table (cont.) • Vertical columns of elements are called ___________ • Rows of elements are called _________ • Elements in groups 1,2, and 13-18 possess a wide variety of chemical and physical properties and are called the representative elements (or the main group elements). ...
Chapter 5 - Midway ISD
... Contains metals, non-metals, and metalloids, thus wide range of properties Group 17 – halogens ...
... Contains metals, non-metals, and metalloids, thus wide range of properties Group 17 – halogens ...
Ionization energy
... 2) In order to make the elements fit the requirements, Mendeleev was forced to put an element of slightly higher atomic weight ahead of one of slightly lower atomic weight. ...
... 2) In order to make the elements fit the requirements, Mendeleev was forced to put an element of slightly higher atomic weight ahead of one of slightly lower atomic weight. ...
Chapter 3: Atoms and the periodic table
... group of atoms. Some energy levels are only partially filled, which makes it easier for them to gain or lose electrons in order to have a full outer energy level. If an atom gains or loses an electron, it no longer has the same number of electrons as it does protons. Because the charges do not cance ...
... group of atoms. Some energy levels are only partially filled, which makes it easier for them to gain or lose electrons in order to have a full outer energy level. If an atom gains or loses an electron, it no longer has the same number of electrons as it does protons. Because the charges do not cance ...
The Periodic Table
... – Tend to form salts with group 1 elements – Most reactive of the nonmetals – Have 7 valence electrons ...
... – Tend to form salts with group 1 elements – Most reactive of the nonmetals – Have 7 valence electrons ...
Physical Science Unit 1 – Atomic Theory and the Periodic Table
... How can you find the charge on an ion such as sodium? The charge is simple the atomic number (number of protons) minus the number of electrons surrounding the nucleus. The atomic number of chlorine is 17. If a chlorine atom has 18 electrons, the charge is 17 – 18 = -1. The atomic number of sodium is ...
... How can you find the charge on an ion such as sodium? The charge is simple the atomic number (number of protons) minus the number of electrons surrounding the nucleus. The atomic number of chlorine is 17. If a chlorine atom has 18 electrons, the charge is 17 – 18 = -1. The atomic number of sodium is ...
Lectures 14-15 - U of L Class Index
... Most electrons do not ‘feel’ the full positive charge of the nucleus. Other electrons in the atom (particularly those in lower energy orbitals) ‘shield’ some of this charge. The amount of positive charge ‘felt’ by an electron in a given orbital is called the effective nuclear charge (Zeff). The foll ...
... Most electrons do not ‘feel’ the full positive charge of the nucleus. Other electrons in the atom (particularly those in lower energy orbitals) ‘shield’ some of this charge. The amount of positive charge ‘felt’ by an electron in a given orbital is called the effective nuclear charge (Zeff). The foll ...
periodic law
... • Atoms get larger as you go down a column because 3 things occur: – there are more energy levels between outer e- and nucleus – distance from the nucleus increases – increased amount of shielding ...
... • Atoms get larger as you go down a column because 3 things occur: – there are more energy levels between outer e- and nucleus – distance from the nucleus increases – increased amount of shielding ...
1 CHAPTER 5 – THE PERIODIC LAW What types of useful
... So, what is the outermost occupied level in a K atom? __________ a Fr atom? __________ a P atom? __________ What period would an atom with the e- config. 1s22s22p63s1? ___________ How about one with the config. 1s22s22p63s23p64s23d8? ___________ ...
... So, what is the outermost occupied level in a K atom? __________ a Fr atom? __________ a P atom? __________ What period would an atom with the e- config. 1s22s22p63s1? ___________ How about one with the config. 1s22s22p63s23p64s23d8? ___________ ...
1 CHAPTER 5 – THE PERIODIC LAW What types of useful
... So, what is the outermost occupied level in a K atom? ____4______ a Fr atom? ___7_______ a P atom? ____3______ What period would an atom with the e- config. 1s22s22p63s1? _____3______ How about one with the config. 1s22s22p63s23p64s23d8? ______4_____ ...
... So, what is the outermost occupied level in a K atom? ____4______ a Fr atom? ___7_______ a P atom? ____3______ What period would an atom with the e- config. 1s22s22p63s1? _____3______ How about one with the config. 1s22s22p63s23p64s23d8? ______4_____ ...
Periodic Table Packet
... 1. Color a box around each of the alkali metals, atomic numbers 3, 11, 19, 37,55, and 87 red, because they are wildly reactive. Color lightest at the top through darkest at the bottom to indicate the increasing reactivity of the group members. 2. Color a box around each of the alkaline earth metals, ...
... 1. Color a box around each of the alkali metals, atomic numbers 3, 11, 19, 37,55, and 87 red, because they are wildly reactive. Color lightest at the top through darkest at the bottom to indicate the increasing reactivity of the group members. 2. Color a box around each of the alkaline earth metals, ...
Enriched Chemistry Chapter 5 * The Periodic Law
... Mendeleev’s periodic table grouped elements by their properties. • Mendeleev placed the name of each known element on a card, with the atomic mass and the observed phys/chem properties • He then arranged them in various configurations, looking for patterns or ...
... Mendeleev’s periodic table grouped elements by their properties. • Mendeleev placed the name of each known element on a card, with the atomic mass and the observed phys/chem properties • He then arranged them in various configurations, looking for patterns or ...
Period 3 element
A period 3 element is one of the chemical elements in the third row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the elements as their atomic number increases: a new row is begun when the periodic table skips a row and a chemical behaviour begins to repeat, meaning that elements with similar behavior fall into the same vertical columns. The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block. Note that there is a 3d orbital, but it is not filled until Period 4, such giving the period table its characteristic shape of ""two rows at a time"". All of the period 3 elements occur in nature and have at least one stable isotope.