Chemical Basis of Life
... Title: The Chemical Basis of Life
1- Introduction: Your body is an elaborate chemical system. Chemical reactions
power all of the body’s activities. At the most basic level, life is about
chemicals and how they interact with each other.
2- Matter – Matter is anything that has mass and occupies space ...
... What are the 3 subatomic particles?
Where are they located and what role
do they play in matter?
Atomic Crossword Name: Period: ____
... 7. Particle with no charge
8. Greek thinker who first coined the term "atomos"
11. A _____________ electron is in the outermost shell of an atom
12. Formed when atoms share electrons
14. Has a different number of neutrons than normal
15. The splitting of an atomic nucleus (usually with heavy element ...
atomic number - Thomas C. Cario Middle School
... The periodic table is a chart containing information about
the atoms that make up all matter.
An element is a substance made up of only one type of
The atomic number of an atom is equal to the number of
protons in its nucleus.
The number of electrons surrounding the nucleus of an
atom is equal ...
Chapter 14 Review
... 6. Which part of the atom dictates its chemical properties?
... Which element in period 3 has 6 valence electrons?
Which element in period 5 has only 1 electron in its 5s sublevel?
Which element in period 3 has a full octet?
What family of elements has only 1 valence electron?
Which family of elements has a filled valence shell?
Which is larger? A Lithium atom o ...
... atom: The smallest particles that make up matter.
proton: a subatomic particle that has a positive charge and that is located in the
nucleus of an atom. (The number of protons in the nucleus is the atomic number,
which determines the identity of an element.)
neutron: a subatomic particle that has no ...
Chap 7: Around the Room Review
... 1. The central part of an atom is called the _____
2. A proton has a _____ charge.
3. The atomic number tells us __________.
4. Nitrogen’s atomic number is 7. An isotope of nitrogen containing 7 neutrons would be nitrogen_____.
5. How does the size of a negative ion compare to the size of the atom t ...
Homework Geochem Test Review
... 12. What part of an atom is negative? _________ What part is positive? _________
What part is neutral? ___________
13. What is the atomic mass? Why don’t we count the electrons when determining the
Chapter 6 Review“The Periodic Table”
... Review“The Periodic Table”
1. How is the number of neutrons in the nucleus of an atom calculated?
2. All atoms are neutral, with the number of protons equaling the ___.
3. Isotopes of the same element have different _____.
4. Using the periodic table, determine the number of neutrons in 16O.
5. What ...
Intro to Atoms Clicker Questions 1. "atomos" means? 2. Atoms of one
... are located where?
6. Rutherford's proof of the proton's location in the atom came from an
experiment with _______
7. In the Bohr model of the atom, electrons are arranged how?
8. A neutron has (a) _____ charge
9. (T/F) The number of neutrons in an atom has to equal the number of
10. (T/F) ...
IPC Atoms and Periodic Table
... having the same number
of protons in the nucleus,
or the same atomic
number, but having
different numbers of
neutrons in the nucleus,
or different atomic
Element Blocks Project
... Your assignment is to produce an element block that will have six sides,
each having different information about your element. Elements will be
assigned randomly. Your teacher will show you how to make the block after
you have researched and obtained all the information that will go onto you
... Sources for appropriate videos may include:
Discovery Education and
AGC Educational Media
Chapter 4 Study Guide Physical Science 1. The word atom comes
... 2. Halogens are very reactive elements located in Group _______of the periodic table.
3. The nucleus of an atom has a(n) ____________________ electric charge.
4. Carbon is found in group ______ of the periodic table.
5. Bohr’s model of the atom compares electrons to ____________________.
6. Elements ...
... the weighted average of the masses of the
naturally occurring isotopes of an element.
The atomic mass of an element can be
found on the periodic table.
Since it is an average, it is usually not a
... (p+ and nº are
1835 x larger e-)
Dubnium is a chemical element with symbol Db and atomic number 105. It is named after the town of Dubna in Russia (north of Moscow), where it was first produced. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, dubnium-268, has a half-life of approximately 28 hours.In the periodic table of the elements, it is a d-block element and in the transactinide elements. It is a member of the 7th period and belongs to Group 5. Chemistry experiments have confirmed that dubnium behaves as the heavier homologue to tantalum in group 5. The chemical properties of dubnium are characterized only partly. They are similar to those of other group 5 elements.In the 1960s and 1970s, microscopic amounts of dubnium were produced in laboratories in the former Soviet Union and in California. The priority of the discovery and therefore the naming of the element was disputed between Soviet and American scientists, and it was not until 1997 that IUPAC established ""dubnium"" as the official name for the element.