Unit 1- Trends on the Table Flashcards Preview

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Flashcards in Unit 1- Trends on the Table Deck (21)
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1

Define atomic radius.

A measurement of the size of an atom in picometers.

2

Define electronegativity.

The relative ability of an atom, when bonded, to attract electrons

3

Define electron affinity.

The energy change that occurs when an electron is accepted by an atom.

4

Trend in ionization energy
L-> R
T-> B
Around noble gas

L-> R
Increases
T-> B
Decreases
Around noble gas
After decreases dramatically

5

Atomic radius
L-> R
T-> B
Around noble gas

L-> R
Decreases
T-> B
Increases
Around noble gas
After increases dramatically

6

Know how to explain using...

The two theories
Zeff and energy levels

7

Electron affinity
L-> R
T-> B
Around noble gas

L-> R
Increases
T-> B
Decreases
Around noble gas
At noble gas decreases dramatically to

8

Electronegativity
L-> R
T-> B
Around noble gas

L-> R
Increases
T-> B
Decreases
Around noble gas
At noble gas decreases dramatically to 0

9

Make sure to draw Bohr diagram to aid in explanation

Guyctuyvtuftydu

10

Define ionization energy.

The amount of energy required to remove an electron from an atom or ion

11

State and explain trends using Zeff and energy levels for reactivity

reactivity increases from left to right, this occurs because of the increasing Zeff
energy levels do not affect this Trend

decreases dramatically at the noble gas because of the low Zeff

decreases from top to bottom because of the energy level

12

reactivity of elements versus position on the periodic table lab

metals
decreases left to right
increases top to bottom

non metals
left to right no data
decreases top to bottom

13

explain why metals lose and nonmetals gain electrons when they react

use Zeff and energy levels

14

explain why fluorine gains one and not two electrons when it reacts

Zeff and energy levels

15

explain why magnesium loses two and not three electrons when it reacts

use Zeff and energy levels

16

explain why noble gases are unreactive

use Zeff and energy levels

17

explain why

the reactivity of alkali metals increases top to bottom

halogens decreased top to bottom

metals decreased left to right

use Zeff and energy levels

18

Define Zeff/Effective nuclear charge

The comparison of the number of protons in the nucleus to the number of shielding electrons

19

matter

has mass and takes up space

20

What is a use of technetium 99 isotope?

It is injected into your body to determine where your cancer is. Using a gamma cam doctors can see where it goes and where cells are dividing rapidly.

21

Energy levels

they create distance between the nucleus and electrons therefore decreasing the attractive force