Chem Q1 IA review

Mix It Up

1

Define a homogenous mixture and give an example

A mixture where all components are thoroughly mixed and there are no visual differences throughout the sample

EX: salt water, alcohol and water

2

What four things MUST be included in any particle diagram

key, LOCOM, kinetic energy, correct phase

3

Create a separation plan for a mixture of salt, sand, water and oil

decant oil, filter sand, distill water @ 100°C, salt left behind

4

There are two ways to separate miscible liquids. Name both, their differences, and provide an example of a mixture of a miscible liquids

evaporation and distillation. Evap only collects one product (whatever is left behind), and distillation collects both.

EX: H₂O and alcohol

5

Describe the separation technique and how it works that to separate pigments

Chromatography: separates pigments based on weight, and attraction to the medium that is wicking up the paper

ID Me

1

I am an element with 14 protons... who am I? (spelling counts)

Silicon

2

What is the atomic symbol if a atom that have 17 protons, 19 neutrons, and 18 electrons

Cl mass 36, atomic # 17, charge -1

3

I am the heavier metalloid in the 4th energy level. Who am I and what is my preferred charge?

Arsenic with a charge of -3

4

What tool is used to separate isotopes of the same element and measure their relative abundances?

Mass spectrometry

5

I am a metalloid with a charge of +4. Who am I?

Germanium

Configure It Out

1

Write the electron configuration for a neutral atom of magnesium

1s²2s²2p⁶3s²

2

Write the abbreviated electron configuration for manganese

[Ar]4s²3d⁵

3

What is the preferred charge of barium?

+2

Daily double: write the noble gas configuration of barium

4

Draw the orbital diagram of a neutral atom of sulfur

5

Draw the orbital diagram of niobium (Nb)

Charge My Card

1

Hydrogen with a +1 charge has how many electrons?

0

2

when you are given the charge of an atom, what math do you have to do to solve for the number of electrons?

Take the atomic number, and do the opposite operation to the chard (ex +2 charge, subtract 2 from the atomic number)

3

Atoms in the same group have the same ___________, and therefore share the same _________________ and _______________

Atoms in the same have the same number of valence electrons, and therefore share the same characteristics and preferred charge

4

How many electrons does tellurium have with its preferred charge, and what element is it isoelectronic with?

Xenon, 54

5

An atom with 53 protons and 54 electrons has what charge?

-1

Bonus ID the element

How do I...

1

Determine the mass of an atom if I know the number of protons, neutrons, and electrons

 add the protons (atomic number) with the number of neutrons

2

Calculate the average atomic mass of an element?

((mass of isotope 1 X %abundance) + (mass of isotope 2 X %abundance) + .........)/100

3

How do I determine what elements share similar chemical and physical characteristics?

Find elements that are in the same group/family

4

How do I write the isotopic name of an atom? Give an exampl

element-mass

EX: sulfur-32 and sulfur-33

Carbon-12, carbon-13, carbon-14

5

Describe the steps we take to write the abbreviated electron configuration of an element

1. find element

2. go back one E level, find noble gas

3. bracket noble gas symbol

4. complete the remaining EC starting with the next energy level and sublevel)