Question

atoms, elements and compounds student worksheet
compound name\tchemical formula (1 molecule)\telements in 1 molecule (name, symbol, # atoms)\t# of elements in 1 molecule\ttotal # of atoms in 1 molecule
calcium chloride (road salt)\tcacl₂

sodium chloride (table salt)\tnacl

calcium carbonate (chalk)\tcaco₃

hydrogen peroxide (peroxide)\th₂o₂

carbon monoxide\tco

sodium bicarbonate (baking soda)\tnahco³

acetone (nail polish remover)\tch₃coch₃

sucrose (cane sugar)\tc₁₂h₂₂o₁₁

sodium hydroxide (drain cleaner)\tnaoh

fructose (simple sugar/fruit)\tc₂h₁₂o₆

acetic acid (white vinegar)\tch₃co₂h

Explanation:

Step1: Identify elements and count atoms in $CaCl_2$

Calcium (Ca) - 1 atom, Chlorine (Cl) - 2 atoms. 2 elements in total, 3 atoms in total.

Step2: Identify elements and count atoms in $NaCl$

Sodium (Na) - 1 atom, Chlorine (Cl) - 1 atom. 2 elements in total, 2 atoms in total.

Step3: Identify elements and count atoms in $CaCO_3$

Calcium (Ca) - 1 atom, Carbon (C) - 1 atom, Oxygen (O) - 3 atoms. 3 elements in total, 5 atoms in total.

Step4: Identify elements and count atoms in $H_2O_2$

Hydrogen (H) - 2 atoms, Oxygen (O) - 2 atoms. 2 elements in total, 4 atoms in total.

Step5: Identify elements and count atoms in $CO$

Carbon (C) - 1 atom, Oxygen (O) - 1 atom. 2 elements in total, 2 atoms in total.

Step6: Identify elements and count atoms in $NaHCO_3$

Sodium (Na) - 1 atom, Hydrogen (H) - 1 atom, Carbon (C) - 1 atom, Oxygen (O) - 3 atoms. 4 elements in total, 6 atoms in total.

Step7: Identify elements and count atoms in $CH_3COCH_3$

Carbon (C) - 3 atoms, Hydrogen (H) - 6 atoms, Oxygen (O) - 1 atom. 3 elements in total, 10 atoms in total.

Step8: Identify elements and count atoms in $C_{12}H_{22}O_{11}$

Carbon (C) - 12 atoms, Hydrogen (H) - 22 atoms, Oxygen (O) - 11 atoms. 3 elements in total, 45 atoms in total.

Step9: Identify elements and count atoms in $NaOH$

Sodium (Na) - 1 atom, Oxygen (O) - 1 atom, Hydrogen (H) - 1 atom. 3 elements in total, 3 atoms in total.

Step10: Identify elements and count atoms in $C_2H_{12}O_6$

Carbon (C) - 2 atoms, Hydrogen (H) - 12 atoms, Oxygen (O) - 6 atoms. 3 elements in total, 20 atoms in total.

Step11: Identify elements and count atoms in $CH_3CO_2H$

Carbon (C) - 2 atoms, Hydrogen (H) - 4 atoms, Oxygen (O) - 2 atoms. 3 elements in total, 8 atoms in total.

Compound Name	Chemical Formula (1 molecule)	Elements in 1 molecule (name, symbol, # atoms)	# of elements in 1 molecule	Total # of atoms in 1 molecule
sodium chloride (table salt)	$NaCl$	Sodium (Na, 1), Chlorine (Cl, 1)	2	2
calcium carbonate (chalk)	$CaCO_3$	Calcium (Ca, 1), Carbon (C, 1), Oxygen (O, 3)	3	5
hydrogen peroxide (peroxide)	$H_2O_2$	Hydrogen (H, 2), Oxygen (O, 2)	2	4
carbon monoxide	$CO$	Carbon (C, 1), Oxygen (O, 1)	2	2
sodium bicarbonate (baking soda)	$NaHCO_3$	Sodium (Na, 1), Hydrogen (H, 1), Carbon (C, 1), Oxygen (O, 3)	4	6
acetone (nail polish remover)	$CH_3COCH_3$	Carbon (C, 3), Hydrogen (H, 6), Oxygen (O, 1)	3	10
sucrose (cane sugar)	$C_{12}H_{22}O_{11}$	Carbon (C, 12), Hydrogen (H, 22), Oxygen (O, 11)	3	45
sodium hydroxide (drain cleaner)	$NaOH$	Sodium (Na, 1), Oxygen (O, 1), Hydrogen (H, 1)	3	3
Fructose (simple sugar/fruit)	$C_2H_{12}O_6$	Carbon (C, 2), Hydrogen (H, 12), Oxygen (O, 6)	3	20
acetic acid (white vinegar)	$CH_3CO_2H$	Carbon (C, 2), Hydrogen (H, 4), Oxygen (O, 2)	3	8

Answer:

The completed table as shown above.