1. A stable carbon atom has the following parts: – 6 protons – 6 neutrons – 6 electrons Describe the location of each of these parts in a carbon atom. 9 8 10 20 30 7 5 2 3 4
180 6 40
130
140 50
120 70 80 60
160
170 1
150
100 90
110
Seconds Left:

2. Protons and neutrons are found in the nucleus of the atom, at the very center. Electrons are found in an electron cloud that surrounds the nucleus.

3. Describe the three kinds of particles found in atoms.
Where are they located & what are their charges?
This screen will disappear in 3 minutes. 9 10
180 8 20 6 3 4 5 40 7 30 50
140
120
130 70 60 90 80
160 2
170
150
100
110 1
Seconds
Remaining.

4. Protons – in the nucleus, positive charge
Neutrons – in the nucleus, no charge
Electrons – outside the nucleus, negative charge

5. An electrically neutral atom undergoes a change to become negatively charged. The atom's atomic mass decreases. A student explains that the atom most likely lost a neutron. – Describe one strength and one weakness of the student's explanation. 9 8 10 20 30 7 5 2 3 4
180 6 40
130
140 50
120 70 60 1
160
170
110
150 80
100 90
Seconds left:

6. One strength of the explanation is that an atom's mass consists mostly of the mass of its protons and neutrons. Electrons have very little mass. So, the atom must have lost either a proton or neutron. One weakness, however, is that neutrons have no charge. So, removing the neutron should not affect the atom's charge. It is more likely that a proton was removed.

7. Draw the Diagram
–Identify the four parts of the atom that are pointed out by arrows in the diagram above. –Describe the electrical charges of the structures that are labeled 1, 2, and 3 in the diagram. 9 8 10 20
180 7 5 2 3 4 40 6 30
130
140 50
120 70 60 1
160
170
110
150 90 80
100
You have
Seconds left.

8. Number 1 is the electron, 2 is the proton, 3 is the neutron, and 4 is the nucleus. The electron is negative. The proton is positive. The neutron is neutral.

9. Define these terms:
Atom
Isotope
Ion 9 8 10 20
180 7 5 2 3 4 40 6 30
130
140 50
120 70 60 1
160
170
110
150 90 80
100
Time left:
Seconds

10. ATOM – the smallest part of matter that has the properties of the matter
ISOTOPE – different forms of the same atom; they have the same numbers of protons, but different numbers of neutrons
ION – an atom that has lost or gained electrons

11. An atom consists of 7 neutrons, 7 electrons, and a number of protons
An atom consists of 7 neutrons, 7 electrons, and a number of protons. The atom has a charge of -1. What is its mass number? 9 8 10 20 30 7 5 2 3 4
180 6 40
130
140 50
120 70 60 1
160
170
110
150 80
Seconds Left:
100 90

12. The atom has a mass number of 13
To find the mass number we have to know the # of protons & the # of neutrons.
We know there are 7 neutrons; ??? protons
An atom with a charge of -1 has gained an electron (added a – charge)
Atoms begin w/ = numbers of protons & electrons, so the atom began with 6 electrons & 6 protons.
6 protons + 7 neutrons =
a mass # of 13

13. What are the biggest parts of an atom?
Seconds
Remaining: 8 7 9 20 6 10 4 2 3 30 5 40
130
120
140 70 50 60
180
170
160
150 80
110 90
100 1

14. Protons & Neutrons

15. A stable helium atom contains 2 protons, 2 neutrons, and 2 electrons
A stable helium atom contains 2 protons, 2 neutrons, and 2 electrons. – Draw and label a diagram of a stable    helium atom. Be sure to include the    protons, neutrons, electrons, and nucleus of the atom in your diagram. 9 8 10 20 30 7 5 2 3 4
180 6 40
130
140 50
120 70 80 60
160
170 1
150
100 90
110
Seconds Left:

16. Helium Atom