What Holds The Atoms Together
Question
Respond
Explanation
31 An Arrhenius acid has
(1) merely hydroxide ions in solution
(2) only hydrogen ions in solution
(3) hydrogen ions as the only positive ions in solution
(4) hydrogen ions as the only negative ions in solution
3
Acid H+ base OH-
32 Which type of radioactive emission has a positive accuse and weak penetrating power?
(ane) alpha particle (three) gamma ray
(2) beta particle (four) neutron
1
Blastoff +
Beta �
Neutron no charge
Gamma no charge
1
The metal has a metallic bail. Mercury-Hg
34 What is the name of the procedure in which the nucleus of an atom of one element is changed into the nucleus of an atom of a different element?
(i) decomposition (three) exchange
(ii) transmutation (4) reduction
2
Definition transmutation
35 A catalyst is added to a system at equilibrium. If the temperature remains abiding, the activation energy of the forward reaction
(one) decreases
(2) increases
(iii) remains the aforementioned
ane
Catalyst lowers the activation energy
36 The nucleus of an atom of M-42 contains
(ane) 19 protons and 23 neutrons
(two) 19 protons and 42 neutrons
(3) xx protons and 19 neutrons
(four) 23 protons and 19 neutrons
one
Potassium has 19 protons always
42-nineteen=23 neutrons
37 What is the full number of electrons in a Cu+ ion?
(1) 28 (iii) 30
(two) 29 (4) 36
1
A Copper Atom has 29 electrons but information technology is an ion hither so 28.
38 Which listing of elements is arranged in club of increasing atomic radii?
(one) Li, Be, B, C (iii) Sc, Ti, V, Cr
(2) Sr, Ca, Mg, Be (4) F, Cl, Br, I
4
Fallen down snowman
39 Which isotope is nigh commonly used in the radioactive dating of the remains of organic materials?
(1) xiv C (three)32 P
(2) 16 Northward (4)37 1000
1
Organic =carbon
40 Co-ordinate to Reference Table H, what is the vapor force per unit area of propanone at 45�C?
(1) 22 kPa (3) 70. kPa
(2) 33 kPa (four) 98 kPa
3
Await it upward table H
What Holds The Atoms Together,
Source: http://www.kentchemistry.com/RegentsExams/regents_jun_2003_31_40.htm
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