Unit 2 Atoms

Atomic Theory

100

This scientist theory states that atoms are tiny, hard and uncuttable. water atoms are round and fire atoms have sharp edges.

Who is Democritus?

200

This scientist theory says that atoms are divisible units composed of positive charges in the nucleus and negative charges orbiting around the nucleus

Who is Dalton?

300

this scientist theory states that electrons are limited to circular orbits around the nucleus, similar to how the planets orbit the sun. 

who is Bohr?

400

This scientist produced the theory that an atom is a sphere of positive charge with a few negatively charged particles called electrons, distributed in the nucleus like raisins in pudding.

who is Thomson?

500

This scientist developed a theory, a way to find electrons within a space surrounding the nucleus. The cloud is denser where the probability of finding the electron is high. The cloud is less dense where the probability of finding the electron is low. 

Who is Schrodinger?

Subatomic Particles

100

The three subatomic particles found in an atom. 

What are protons, neutrons and electrons? (answer is not in a particular order)

200

Contains negatively charged particles that orbit around the nucleus

What is electrons?

300

Changing the mass of an element, changes the number of neutrons found in the nucleus. 

What is an isotope?

400

The identification of an element on the periodic table. Equivalent to the number of protons and electrons of an element.

What is the atomic number?

500

The nucleus contains these positively charged protons and neutrally charged neutrons. Tells us how much one atom of an element weighs.  

What is the atomic mass?

Bohr's Model

100

Draw the Bohr's Model Structure of Nitrogen

First level: 2e^-

Second level: 5e^-

200

Draw the Bohr's Model Structure of Chlorine

First level: 2e^-

Second level: 8e^-

Third Level: 7e^-

300

Draw the Bohr's Model Structure of Calcium

First level: 2e

second level: 8e

Third level: 8e

Fourth level: 2e

400

How many valence electrons are there in Indium?

what is 3 valence electrons?

500

How many valence electrons will always be present in the Halogen group (Group 17)?

What is 7 valence electrons?

Electron Configuration

100

Write the electron configuration of Aluminum

What is 1s²2s²2p⁶3s²3p¹ ?

200

Read the following configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁹

What element does this correspond to?

What is copper (Cu)?

300

Write the noble gas configuration of Europium (Eu)

What is [Xe] 6s²4f⁷

400

Write the noble gas configuration of Cadmium

what is [Kr] 5s²4d¹⁰ ?

500

Write the electron configuration of Molybdenum with a +2 charge

Mo⁺²

^{What element shares this same configuration? (extra 500 points)}

What is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²?

What is Zirconum or Zr?

Nuclear Decay

100

Losing a particle that is the equivalent of gaining one electron, adds 1 to the atomic number. 

What is beta decay?

200

Changing both the mass and the atomic number with a particle of helium

what is alpha decay?

300

the atomic mass and the atomic number don't change but waves of this type of particle are emitted. 

what is gamma decay?

400

Write the alpha decay of Germanium with an Isotopic mass of 80. What should be the new element formed?

what is zinc or Zn?

500

Write the beta decay of Mercury. What is the new element that is formed?

What is Thallium?