chem

How do you identify the mass number?

#protons + #neutrons

What is the mass of an electron?

0 amu

What is the mass of an neutron?

1 amu

What is the mass of a proton?

1 amu (atomic mass unit)

Bohr's drawing for hydrogen

1 electron 1 proton

First 20 elements and the amount of protons, neutrons, and electrons they contain

1. Hydrogen- P-1, E-1, N-0 2 Helium- P-2, E-2, N-2 3. Lithium- P-3, E-3, N-4 4. Beryllium- P-4, E-4, N-5 5. Boron- P-5, E-5, N-5 6. Carbon- P-6 , E-6 , N-6 7. Nitrogen- P-7 , E-7 , N-7 8. Oxygen- P-8 , E-8 , N-8 9. Fluorine- P-9 , E-9 , N-10 10. Neon- P-10 , E-10 , N-10 11. Sodium- P-11 , E-12 , N-11 12. Magnesium- P-12 , E-12 , N-12 13. Aluminum- P-13 , E-13 , N-14 14. Silicon- P-14, E-14 , N-14 15. Phosphorous- P-15 , E-15, N-16 16. Sulfur- P-16, E-16, N-16 17. Chlorine- P-17 , E-17 , N-18 18. Argon- P-18 , E-18 , N-22 19. Potassium- P-19, E-19, N-20 20. Calcium- P-20, E-20, N-20

What are the first 20 elements, their symbol, and its atomic mass

1. Hydrogen-H- 1 2. Helium- Hi- 4 3. Lithium-Li- 7 4. Beryllium- Be- 9 5. Boron- B- 11 6. Carbon-C- 12 7. Nitrogen- Ni- 14 8. Oxygen- O- 16 9. Fluorine- F- 19 10. Neon- Ne- 20 11. Sodium- Na- 23 12. Magnesium- Mg- 24 13. Aluminum- Al- 27 14. Silicon- Si- 28 15. Phosphorous- P- 31 16. Sulfur- S- 32 17. Chlorine- Cl- 35 18. Argon- Ar- 40 19. Potassium- K- 39 20. Calcium- Ca- 40

Bohr's drawing for neon

10 protons neutrons and electrons

Bohr's drawing for sodium

11 protons 12 electrons 11 neutrons

Bohr's drawing for magnesium

12 protons neutrons and electrons

Bohr's drawing for aluminum

13 protons 13 electrons 14 neutrons

Bohr's drawing for silicon

14 protons neutrons and electrons

Bohr's drawing for phosphorous

15 protons 15 electrons 16 neutrons

Bohr's drawing for sulfur

16 protons neutrons and electrons

Bohr's drawing for chlorine

17 protons 17 electrons 18 neutrons

Bohr's drawing for argon

18 protons 18 electrons 22 neutrons

Bohr's drawing for potassium

19 protons 19 electrons 20 neutrons

Bohr's drawing for helium

2 protons 2 neutrons 2 electrons

Bohr's drawing for calcium

20 protons neutrons and electrons

Bohr's drawing for lithium

3 protons 3 electrons 4 neutrons

Bohr's drawing for beryllium

4 protons 4 electrons 5 neutrons

Bohr's drawing for boron

5 protons 5/6 neutrons 5 electrons

Bohr's drawing for carbon

6 protons 6 neutrons 6 electrons

Bohr's drawing for nitrogen

7 protons neutrons and electrons

Bohr's drawing for oxygen

8 protons neutrons and electrons

Bohr's drawing for fluorine

9 protons 9 electrons 10 neutrons

What is a Lewis dot diagram?

A diagram that has the elements symbol surrounded by the number of valence electrons it has (dots)

How do you identify if an atom is a regular atom or an ion?

Atoms are neutral; they contain the same number of protons as electrons. By definition, an ion is an electrically charged particle produced by either removing electrons or gaining electrons

isotope

Atoms of the same element that have different numbers of neutrons

How do you identify if an atoms is a regular atom or an isotope?

If the number of neutrons in the given atom is different, than it is an isotope.

What is noble gas configuration?

Taking the preceding noble gas and start from there with electron configuration

How do you identify the number of protons?

atomic number

Why do atoms desire to achieve the noble gas configuration?

because it has low energy, so atoms on the left of the periodic table are willing to give away electrons to reach that state, while atoms on the right of it would like to take electrons to reach it

What are ions?

charged particles

What makes an atom neutral in charge?

if it has the same number of electrons and protons

Where is the neutron located in the atom?

inside the nucleus

Where is the proton located in the atom?

inside the nucleus

What is the charge of an electron?

negative

What is the charge of a neutron?

neutral (0) no charge

Where is the electron located in the atom?

outside the nucleus

What is the charge of a proton?

positive

What are the 3 subatomic particles?

protons, neutrons, electrons

is carbon a regular atom or an isotope?

regular atom because carbon has six protons and is atomic number 6

How do you find the number of electrons?

same as the number of protons

How are negative ions formed?

when an atom gains electrons

How are positive ions formed?

when an atom loses electrons