WorksheetsElements
Total questions: 20
Worksheet time: 10mins
What element is found in bones, stalactites, and materials such as marbles , limestone and cement. It makes flame turn orange.
Phosphorus
Calcium
Chlorine
Iron
What is the number of neutron in an element Potassium?
29
30
20
16
Which of the following sentences BEST describe an element?
a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei
composed of many identical molecules composed of atoms from more than one element held together by chemical bonds
material made up of two or more different Chemical substance/substances which are not chemically combined
an extremely small piece of matter that is smaller than an atom or found inside an atom
What is the chemical symbol for Platinum?
P
Pn
Pt
PT
Each atom always has the same number of electrons and ______________.
Neutrons
Sub-atomic particles
Protons
Atoms
What is the atomic number of Chlorine?
8
33
21
17
What is the number of neutrons for Nickel?
21
30
20
31
What ranked as the second lightest element and makes balloons and airships float?
Nitrogen
Oxygen
Helium
Hydrogen
What is the mass number of the element Tin?
50
118.71
69
Sn
What is the chemical symbol for the element Lead?
L
Le
Ld
Pb
What element is often used in glass and pigments because it displays an attractive color blue?
Cobalt
Aluminum
Selenium
Livermorium
What element has an atomic number of 99?
Berkelium
Cerium
Einsteinium
Nobelium
What is the number of electrons in the element Barium?
56
81
137.3
137
How many known elements are there in our planet earth as of today?
103
98
128
118
What element has a chemical symbol of Cu?
Copper
Cobalt
Chromium
Cerium
What element has a chemical symbol of Bi?
Beryllium
Bromine
Barium
Bismuth
What is the number of neutrons in the element Titanium?
22
47.87
48
26
What is the number of neutrons in an element Silicon?
18
28.086
28
14
What is the average atomic mass for this element?
42
95.95
53
48
What element is used to prevent tooth decay by restoring minerals to teeth, and is used in toothpaste and in non-stick frying pans?
Fluorine
Sulfur
Titanium
Copper
