Question

1. draw four protons in the atom to the right. label them with their charge.
2. draw five neutrons in the atom to the right. label them with their charge.
3. draw four electrons in the atom to the right. place two on the first energy level and two on the second. label them with their charge.
4. what element did you just draw?
5. how do you know?

part 2 periodic table

1. label each part of the periodic table notation shown to the right.
2. how do you know the number of protons in an atom?
3. how do you know the number of neutrons?
4. how do you know the number of electrons?

part 3 atomic calculations: complete the chart below.
10.

element	atomic #	mass #	# of p⁺	# of n⁰	# of e⁻
p		31
	35	17
	28			31
k		39
ag			61
	1	1
		14	14
ne			74	110
		10

Explanation:

Step1: Recall atomic - structure basics

The number of protons determines the element. Here, there are 4 protons.

Step2: Identify the element

The element with 4 protons is beryllium (Be).

Answer:

1. Beryllium (Be)
2. The number of protons (4) determines the element, and beryllium has an atomic number of 4.
3. The atomic number on the periodic - table gives the number of protons.
4. Mass number - atomic number = number of neutrons.
5. In a neutral atom, number of electrons = number of protons.

10.

Element	Atomic #	Mass #	# of p⁺	# of n⁰	# of e⁻
P	15	31	15	16	15
-	17	35	17	18	17
-	28	59	28	31	28
K	19	39	19	20	19
Ag	47	108	47	61	47
-	1	1	1	0	1
-	14	28	14	14	14
Ne	10	20	10	10	10