Atomic Structure
What are the three subatomic particles in an atom?
Protons
neutrons
electrons
How many electrons can the first shell hold?
2
What is an ion?
An atom that has gained or lost electrons and therefore has a charge
What is the formula for sodium fluoride
NaF
Which subatomic particle has a positive charge
Proton
What is the electronic configuration of lithium?
2,1
What happens to an atom's charge when it loses an electron?
It becomes more positive / forms a positive ion
Ionic bonding occurs between what two types of elements?
Metals and non-metals
An atom has an atomic number of 11. How many protons does it have
11 Protons
What is the electronic configuration of sodium
2,8,1
What charge would an atom have after gaining 2 electrons?
2-
How old am I
23
An atom has an atomic number of 11 and a mass number of 23. How many neutrons does it have?
12 Neutrons
2,8,6
Magnesium has the configuration 2,8,2. What does it need to do to become stable, and what ion will it form?
Lose 2 electrons and form Mg²⁺
What are the charges of ions in magnesium oxide
Mg2+ % O2-
An atom has 17 protons, 17 electrons and a mass number of 35. State its atomic number, number of neutrons and overall charge.
Atomic number = 17; neutrons = 18; charge = 0/neutral
An element has the electronic configuration 2,8,7. What is its atomic number and how many electrons does it need to gain to have a full outer shell?
Atomic number = 17; it needs to gain 1 electron
A student says: “A sodium ion is neutral because it has a full outer shell.” Explain the mistake.
A full outer shell makes it stable, not neutral. Na⁺ has more protons than electrons, so it has a positive charge.
When was the first iPhone released
2007