1.2 The Modern Periodic Table Flashcards Preview

GCSE Chemistry 3.1 The Periodic Table > 1.2 The Modern Periodic Table > Flashcards

Flashcards in 1.2 The Modern Periodic Table Deck (12)
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1
Q

What are the vertical linings of the elements called?

A

Groups

2
Q

What are the horizontal linings of the elements called?

A

Periods

3
Q

What does the atomic number of an element determine?

A

It’s position in the periodic table

4
Q

What does the number of electrons in an elements highest energy level determine?

A

It’s chemical properties

5
Q

What does the group number equal?

A

The number of electrons in the outermost shell

6
Q

Why do thyroid of elements have the same chemical properties?

A

They have the same number of electrons in their outermost shell

7
Q

Why do the atoms get larger going down a group in the periodic table?

A

They have more energy levels so the atoms are larger

8
Q

What happens between the electrons and the nucleus of an atom as the atoms get larger?

A

The electrons in the highest occupied energy level are less strongly attracted so they are more reactive

9
Q

What happens to the reactivity in metals as you go down the group?

A

It increases

10
Q

Why does the reactivity of metals increase going down the group?

A

Because they lose electrons so they lose an energy level so the atom is smaller and the attraction between the nucleus and the electrons grows

11
Q

Why does the reactivity in non metals decrease as you go down the group?

A

Because they gain electrons so they gain an energy level so the atom is bigger and the attraction between the nucleus and the electrons weakens

12
Q

When did scientists find out about protons and electrons?

A

At the start of the 1900’s