Unit 4
... The resources included here provide teaching examples and/or meaningful learning experiences to address the District Curriculum. In order to address the TEKS to the proper depth and complexity, teachers are encouraged to use resources to the degree that they are congruent with the TEKS and researc ...
... The resources included here provide teaching examples and/or meaningful learning experiences to address the District Curriculum. In order to address the TEKS to the proper depth and complexity, teachers are encouraged to use resources to the degree that they are congruent with the TEKS and researc ...
The Basics of Atomic Structure
... – Anion is an negative ion (created when an atom gains electrons) Notice: it’s the number of electrons and neutrons that change, not the atomic number! ...
... – Anion is an negative ion (created when an atom gains electrons) Notice: it’s the number of electrons and neutrons that change, not the atomic number! ...
Atoms and the Periodic Table
... The Periodic Table 3. Elements in columns are called groups or families a. Total of 18 groups b. Groups have same characteristic and # of valence electrons 1. Ve-: electrons in outer shell c. as elements descend atoms grow larger 4. Elements in rows are called series or periods a. elements are arra ...
... The Periodic Table 3. Elements in columns are called groups or families a. Total of 18 groups b. Groups have same characteristic and # of valence electrons 1. Ve-: electrons in outer shell c. as elements descend atoms grow larger 4. Elements in rows are called series or periods a. elements are arra ...
The evolution of Atomic Theory
... Henri Becquerel: Discovery of radioactivity 1900's Robert Millikan: Charge and mass of the electron Ernest Rutherford: Existence of the nucleus, and its relative size Meitner & Fermi: Sustained nuclear fission Ernest Lawrence: The cyclotron and trans-uranium elements ...
... Henri Becquerel: Discovery of radioactivity 1900's Robert Millikan: Charge and mass of the electron Ernest Rutherford: Existence of the nucleus, and its relative size Meitner & Fermi: Sustained nuclear fission Ernest Lawrence: The cyclotron and trans-uranium elements ...
Atomic Structure - Northwest ISD Moodle
... Isotopes are atoms of the same element that have a ...
... Isotopes are atoms of the same element that have a ...
Chemistry Fall Semester Review Sheet
... 19. Define the law of multiple proportions. Elements form compounds in simple whole number ratios 20. What do isotopes of the same element have in common and what is different? Isotopes have the same number of protons, electrons and atomic number Isotopes have a different mass number and number of ...
... 19. Define the law of multiple proportions. Elements form compounds in simple whole number ratios 20. What do isotopes of the same element have in common and what is different? Isotopes have the same number of protons, electrons and atomic number Isotopes have a different mass number and number of ...
1 Notes Ch. 4 and 25: Atomic Structure and Nuclear Chemistry
... II. Induced Transmutation • Before 1919, the only way to change the nucleus or cause transmutation was to wait for _______________________. • In 1919 Rutherford was the first to induce (_____________________) transmutation. • He proved that nuclear reactions can be produced _________________________ ...
... II. Induced Transmutation • Before 1919, the only way to change the nucleus or cause transmutation was to wait for _______________________. • In 1919 Rutherford was the first to induce (_____________________) transmutation. • He proved that nuclear reactions can be produced _________________________ ...
Elements, Ions and Isotopes
... Dalton’s Atomic Theory - Summary 1. matter is composed, indivisible particles (atoms) 2. all atoms of a particular element are identical 3. different elements have different atoms 4. atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new comp ...
... Dalton’s Atomic Theory - Summary 1. matter is composed, indivisible particles (atoms) 2. all atoms of a particular element are identical 3. different elements have different atoms 4. atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new comp ...
Matter
... We write a + next to the element’s symbol if its atom has lost an electron and a – if it gains an electron. For example: Na becomes Na+ because it has more positive charge than negative and Cl becomes ClOpposites attract! The protons in the nucleus “miss” the “missing” electron and they stay close t ...
... We write a + next to the element’s symbol if its atom has lost an electron and a – if it gains an electron. For example: Na becomes Na+ because it has more positive charge than negative and Cl becomes ClOpposites attract! The protons in the nucleus “miss” the “missing” electron and they stay close t ...
Gr 10 Review sheet chemistry
... Ex. For calcium nitrate 2Ca(NO3)2 The coefficient (2) applies to all elements: Therefore, 2 Ca atoms total 2 N atoms 2 O atoms The subscript 3 only follows O so we have 2 x 3 O = 6 O The subscript 2 is outside brackets, so it applies to N and O Therefore, 2 x 6 O = 12 oxygen atoms total 2 x 2 N = 4 ...
... Ex. For calcium nitrate 2Ca(NO3)2 The coefficient (2) applies to all elements: Therefore, 2 Ca atoms total 2 N atoms 2 O atoms The subscript 3 only follows O so we have 2 x 3 O = 6 O The subscript 2 is outside brackets, so it applies to N and O Therefore, 2 x 6 O = 12 oxygen atoms total 2 x 2 N = 4 ...
Elements of Chemistry The Periodic Table ES14 - rdt-maps-lab
... 3. Divide the class into small groups. Give each group one set of element cards (one for each of the first 36 elements on the periodic table.) Based on the facts on the card, ask groups to fill in the bottom of each card with the following information: • Number of protons, electrons, and neutrons • ...
... 3. Divide the class into small groups. Give each group one set of element cards (one for each of the first 36 elements on the periodic table.) Based on the facts on the card, ask groups to fill in the bottom of each card with the following information: • Number of protons, electrons, and neutrons • ...
History of the Atom
... 1. Each element made of really small particles called atoms 2. All atoms of a given element are identical 3. Atoms of different elements have different properties, like mass and chemical reactivity 4. Atoms aren’t changed by chemical reactions, just rearranged ...
... 1. Each element made of really small particles called atoms 2. All atoms of a given element are identical 3. Atoms of different elements have different properties, like mass and chemical reactivity 4. Atoms aren’t changed by chemical reactions, just rearranged ...
Which has more atoms: a one gram sample of carbon
... Atoms of the same element may have different numbers of neutrons. Carbon may have 6, 7 or 8 neutrons. Hydrogen may have 0, 1 or 2 neutrons. These are called isotopes. Most elements have more than one isotope. Some isotopes are radioactive. Unstable, decay into other elements. Example: ...
... Atoms of the same element may have different numbers of neutrons. Carbon may have 6, 7 or 8 neutrons. Hydrogen may have 0, 1 or 2 neutrons. These are called isotopes. Most elements have more than one isotope. Some isotopes are radioactive. Unstable, decay into other elements. Example: ...
Atoms, Molecules and Ions Part 2
... • Dalton, had proposed that all atoms of the same element must have the same mass. • One of the 2 flaws in Dalton’s theory was, atoms of the same element can have DIFFERENT masses. • The mass of an atom is due to the mass of the protons and the neutrons in that atom. • Isotopes are atoms of the same ...
... • Dalton, had proposed that all atoms of the same element must have the same mass. • One of the 2 flaws in Dalton’s theory was, atoms of the same element can have DIFFERENT masses. • The mass of an atom is due to the mass of the protons and the neutrons in that atom. • Isotopes are atoms of the same ...
PreAP Chemistry
... • Explain the relationship between unstable nuclei and radioactive decay. • Characterize alpha, beta, and gamma radiation in terms of mass and charge. Main Idea: __________________ atoms emit __________________ to gain stability. Radioactivity • __________________ reactions can change one element in ...
... • Explain the relationship between unstable nuclei and radioactive decay. • Characterize alpha, beta, and gamma radiation in terms of mass and charge. Main Idea: __________________ atoms emit __________________ to gain stability. Radioactivity • __________________ reactions can change one element in ...
The Size of the Atom Atomic Numbers Atomic Mass Numbers
... Electrons are much less massive than protons or neutrons—about 2000 times less massive. This means almost all of an atom’s mass is in the nucleus. The electron cloud, however, is much larger than the nucleus. It is about 10,000 times the diameter of the nucleus. The diagram on page 201, picturing th ...
... Electrons are much less massive than protons or neutrons—about 2000 times less massive. This means almost all of an atom’s mass is in the nucleus. The electron cloud, however, is much larger than the nucleus. It is about 10,000 times the diameter of the nucleus. The diagram on page 201, picturing th ...
Atoms - RPDP
... Electrons are arranged in energy levels. Electrons with the lowest energy can be found in the energy level closest to the nucleus. Energy levels can hold 2, 8, 18 ...
... Electrons are arranged in energy levels. Electrons with the lowest energy can be found in the energy level closest to the nucleus. Energy levels can hold 2, 8, 18 ...
Review Questions 1. How many protons does potassium have? 2
... b. Nuclear forces equalize the charges c. The number of protons and electrons is equal d. The number of protons and neutrons is equal 31. The most common form of hydrogen has a. No neutrons b. 1 neutron c. 2 neutrons d. 3 neutrons 32. The name of the scientist who showed the existence of the nucleus ...
... b. Nuclear forces equalize the charges c. The number of protons and electrons is equal d. The number of protons and neutrons is equal 31. The most common form of hydrogen has a. No neutrons b. 1 neutron c. 2 neutrons d. 3 neutrons 32. The name of the scientist who showed the existence of the nucleus ...
Intro to Periodic Table and Lewis Structures
... • By the 1800s, scientists starting looking for ways to organize the elements known at the time [about 68] into a meaningful arrangement. • A number of scientists developed tables of the elements. Since most had shortfalls, none of them were very good. ...
... • By the 1800s, scientists starting looking for ways to organize the elements known at the time [about 68] into a meaningful arrangement. • A number of scientists developed tables of the elements. Since most had shortfalls, none of them were very good. ...